build(deps): downgrade swift to 5.10.1

- swift-actions/setup-swift does not yet support swift 6.0 swift-actions/setup-swift#684 swift-actions/setup-swift#683

Author: Aaron-Ritter

.github/workflows/codeql-package.yml

@@ -41,7 +41,7 @@ jobs:
       fail-fast: false
       matrix:
         # https://github.com/swiftlang/swift/releases
-        swift: ["6.0"]
+        swift: ["5.10.1"]
         os: [macos-latest]
         # https://developer.apple.com/documentation/xcode-release-notes
         xcode: ["16.0"]

.github/workflows/codeql-samples-quickstart.yml

@@ -41,7 +41,7 @@ jobs:
       fail-fast: false
       matrix:
         # https://github.com/swiftlang/swift/releases
-        swift: ["6.0"]
+        swift: ["5.10.1"]
         os: [macos-latest]
         # https://developer.apple.com/documentation/xcode-release-notes
         xcode: ["16.0"]