Disable 5.10 builds and leave those to older releases

Author: phausler

.github/workflows/pull_request.yml

@@ -9,7 +9,7 @@ jobs:
     name: Test
     uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
     with:
-      linux_exclude_swift_versions: "[{\"swift_version\": \"5.9\"}]"
+      linux_exclude_swift_versions: "[{\"swift_version\": \"5.9\"}, {\"swift_version\": \"5.10\"}]]"
       windows_exclude_swift_versions: "[{\"swift_version\": \"5.9\"}]"
       enable_wasm_sdk_build: true
       wasm_sdk_build_command: swift build -Xcc -D_WASI_EMULATED_PTHREAD