Fix broken links in documentation for PackageRegistry (#7070)

Broken link -
https://github.com/apple/swift-package-manager/blob/main/Documentation/Registry.md
Good link -
https://github.com/apple/swift-package-manager/blob/main/Documentation/PackageRegistry/Registry.md

Author: spqw

Documentation/PackageRegistry/PackageRegistryUsage.md

@@ -127,8 +127,8 @@ and apply them automatically when making registry API requests.
 ## Dependency Resolution Using Registry
 
 Resolving a registry dependency involves these steps:
-1. Fetch a package's available versions by calling the [list package releases](https://github.com/apple/swift-package-manager/blob/main/Documentation/Registry.md#41-list-package-releases) API.
-2. Compute the dependency graph by [fetching manifest(s) for a package release](https://github.com/apple/swift-package-manager/blob/main/Documentation/Registry.md#43-fetch-manifest-for-a-package-release).
+1. Fetch a package's available versions by calling the [list package releases](Registry.md#41-list-package-releases) API.
+2. Compute the dependency graph by [fetching manifest(s) for a package release](Registry.md#43-fetch-manifest-for-a-package-release).
 3. Pinpoint the package version to use.
 
 ### Using registry for source control dependencies 
@@ -151,7 +151,7 @@ they are considered different even though they are the same package,
 and would result in symbol clashes.
 
 SwiftPM can deduplicate packages by performing a 
-[lookup on the source control URL](https://github.com/apple/swift-package-manager/blob/main/Documentation/Registry.md#endpoint-5)
+[lookup on the source control URL](Registry.md#endpoint-5)
 (e.g., `https://github.com/mona/LinkedList`) to see if it is associated with 
 any package identifier (e.g., `mona.LinkedList`).
 
@@ -164,7 +164,7 @@ source control dependencies by setting one of these flags:
 ## Dependency Download From Registry
 
 After a registry dependency is resolved, SwiftPM can
-[download source archive](https://github.com/apple/swift-package-manager/blob/main/Documentation/Registry.md#endpoint-4)
+[download source archive](Registry.md#endpoint-4)
 of the computed package version from the registry.
 
 ### Checksum TOFU 
@@ -173,7 +173,7 @@ SwiftPM performs checksum TOFU
 ([trust-on-first-use](https://en.wikipedia.org/wiki/Trust_on_first_use)) 
 on the downloaded source archive. If the archive is downloaded
 for the first time, SwiftPM 
-[fetches metadata of the package release](https://github.com/apple/swift-package-manager/blob/main/Documentation/Registry.md#endpoint-2)
+[fetches metadata of the package release](Registry.md#endpoint-2)
 to obtain the expected checksum. Otherwise, SwiftPM
 compares the checksum with that in local storage (`~/.swiftpm/security/fingerprints/`)
 saved from previous download.
@@ -273,7 +273,7 @@ OPTIONS:
  
 The command creates source archive for the package release,
 optionally signs the package release, and 
-[publishes the package release](https://github.com/apple/swift-package-manager/blob/main/Documentation/Registry.md#endpoint-6)
+[publishes the package release](Registry.md#endpoint-6)
 to the registry.
 
 If authentication is required for package publication, 

Documentation/PackageRegistry/Registry.md

@@ -1273,7 +1273,7 @@ JSON schema below.
 ```json
 {
   "$schema": "https://json-schema.org/draft/2020-12/schema",
-  "$id": "https://github.com/apple/swift-package-manager/blob/main/Documentation/Registry.md",
+  "$id": "https://github.com/apple/swift-package-manager/blob/main/Documentation/PackageRegistry/Registry.md",
   "title": "Package Release Metadata",
   "description": "Metadata of a package release.",
   "type": "object",
@@ -1368,7 +1368,7 @@ JSON schema below.
 | `licenseURL`              | String | URL of the package release's license document. | |
 | `originalPublicationTime` | String | Original publication time of the package release in [ISO 8601] format. This can be set if the package release was previously published elsewhere.<br>A registry should record the publication time independently and include it as `publishedAt` in the [package release metadata response](#42-fetch-information-about-a-package-release). <br>In case both `originalPublicationTime` and `publishedAt` are set, `originalPublicationTime` should be used. | |
 | `readmeURL`       | String | URL of the README specifically for the package release or broadly for the package. | |
-| `repositoryURLs`  | Array | Code repository URL(s) of the package. It is recommended to include all URL variations (e.g., SSH, HTTPS) for the same repository. This can be an empty array if the package does not have source control representation.<br/>Setting this property is one way through which a registry can obtain repository URL to package identifier mappings for the ["lookup package identifiers registered for a URL" API](https://github.com/apple/swift-package-manager/blob/main/Documentation/Registry.md#45-lookup-package-identifiers-registered-for-a-url). A registry may choose other mechanism(s) for package authors to specify such mappings. | |
+| `repositoryURLs`  | Array | Code repository URL(s) of the package. It is recommended to include all URL variations (e.g., SSH, HTTPS) for the same repository. This can be an empty array if the package does not have source control representation.<br/>Setting this property is one way through which a registry can obtain repository URL to package identifier mappings for the ["lookup package identifiers registered for a URL" API](Registry.md#45-lookup-package-identifiers-registered-for-a-url). A registry may choose other mechanism(s) for package authors to specify such mappings. | |
 
 ##### `Author` type
 

Sources/PackageCollectionsModel/Formats/v1.md

@@ -28,7 +28,7 @@ To begin, define the top-level metadata about the collection:
 Each item in the `packages` array is a package object with the following properties:
 
 * `url`: The URL of the package. Currently only Git repository URLs are supported. URL should be HTTPS and may contain `.git` suffix.
-* `identity`: The [identity](https://github.com/apple/swift-package-manager/blob/main/Documentation/Registry.md#36-package-identification) of the package if published to registry. **Optional.**
+* `identity`: The [identity](https://github.com/apple/swift-package-manager/blob/main/Documentation/PackageRegistry/Registry.md#36-package-identification) of the package if published to registry. **Optional.**
 * `summary`: A description of the package. **Optional.**
 * `keywords`: An array of keywords that the package is associated with. **Optional.**
 * `readmeURL`: The URL of the package's README. **Optional.**
@@ -102,7 +102,7 @@ A version object has metadata extracted from `Package.swift` and optionally addi
     * `name`: License name. [SPDX identifier](https://spdx.org/licenses/) (e.g., `Apache-2.0`, `MIT`, etc.) preferred. Omit if unknown. **Optional.**
 * `author`: The package version's author. **Optional.**
     * `name`: The author of the package version.
-* `signer`: The signer of the package version. **Optional.** Refer to [documentation](https://github.com/apple/swift-package-manager/blob/main/Documentation/PackageRegistryUsage.md#package-signing) on package signing for details.
+* `signer`: The signer of the package version. **Optional.** Refer to [documentation](https://github.com/apple/swift-package-manager/blob/main/Documentation/PackageRegistry/PackageRegistryUsage.md#package-signing) on package signing for details.
     * `type`: The signer type. Currently the only valid value is `ADP` (Apple Developer Program).
     * `commonName`: The common name of the signing certificate's subject.
     * `organizationalUnitName`: The organizational unit name of the signing certificate's subject.

Sources/PackageCollectionsModel/PackageCollectionModel+v1.swift

@@ -82,7 +82,7 @@ extension PackageCollectionModel.V1.Collection {
         /// The URL of the package. Currently only Git repository URLs are supported.
         public let url: URL
 
-        /// Package identity for registry (https://github.com/apple/swift-package-manager/blob/main/Documentation/Registry.md#36-package-identification).
+        /// Package identity for registry (https://github.com/apple/swift-package-manager/blob/main/Documentation/PackageRegistry/Registry.md#36-package-identification).
         public let identity: String?
 
         /// A description of the package.

Sources/PackageRegistry/RegistryClient.swift

@@ -28,7 +28,7 @@ public protocol RegistryClientDelegate {
 }
 
 /// Package registry client.
-/// API specification: https://github.com/apple/swift-package-manager/blob/main/Documentation/Registry.md
+/// API specification: https://github.com/apple/swift-package-manager/blob/main/Documentation/PackageRegistry/Registry.md
 public final class RegistryClient: Cancellable {
     public typealias Delegate = RegistryClientDelegate