[update-checkout] Add swift-crypto to the list of repos

This is for swiftlang/swift-package-manager#3202, which adds swift-crypto as a new dependency to SwiftPM to support the upcoming package collection feature.

Author: yim-lee

utils/update_checkout/update-checkout-config.json

@@ -14,6 +14,8 @@
             "remote": { "id": "apple/swift-driver" } },
         "swift-tools-support-core": {
             "remote": { "id": "apple/swift-tools-support-core" } },
+        "swift-crypto": {
+            "remote": { "id": "apple/swift-crypto" } },
         "swiftpm": {
             "remote": { "id": "apple/swift-package-manager" } },
         "swift-syntax": {