Update versions in Example/package-info file (#7666)

### Motivation:

The `Examples/package-info` project fails when following the [readme](https://github.com/apple/swift-package-manager/blob/main/Documentation/libSwiftPM.md) file.

### Modifications:

Update `swift-tools-version` and platform version for `Examples/package-info` project to be able to build with the current SwiftPM.

### Result:

The `Examples/package-info` project builds succesfully

Author: csknns

Examples/package-info/Package.swift

@@ -1,11 +1,11 @@
-// swift-tools-version:5.5
+// swift-tools-version:5.7
 
 import PackageDescription
 
 let package = Package(
     name: "package-info",
     platforms: [
-        .macOS(.v12),
+        .macOS(.v13),
         .iOS(.v13)
     ],
     dependencies: [