Skip older Swift versions in CI

Author: natecook1000

.github/workflows/pull_request.yml

@@ -12,7 +12,7 @@ jobs:
     name: Test
     uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
     with:
-      linux_exclude_swift_versions: '[{"swift_version": "5.9"}, {"swift_version": "5.10"}]'
+      linux_exclude_swift_versions: '[{"swift_version": "5.9"}, {"swift_version": "5.10"}, {"swift_version": "6.0"}, {"swift_version": "6.1"}, {"swift_version": "6.2"}]'
       enable_windows_checks: false
       enable_macos_checks: false
   soundness: