workflows: Disable tests on Windows

Requires NIO support on Windows

Author: euanh

.github/workflows/pull_request.yml

@@ -10,6 +10,7 @@ jobs:
     uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
     with:
       linux_pre_build_command: apt-get update && apt-get install -y locales locales-all libsqlite3-dev
+      enable_windows_checks: false
   soundness:
     name: Soundness
     uses: swiftlang/github-workflows/.github/workflows/soundness.yml@main