Disable nightly-6.1 run for Windows (#1573)

* Disable nightly-6.1 run for Windows

Hasn't been a build off release/6.1 since March 3rd but we need the fix
for swiftlang/swift#80144 that was made March 25th

* Fix lint issue

Author: award999

.github/workflows/nightly.yml

@@ -62,6 +62,7 @@ jobs:
       linux_pre_build_command: . .github/workflows/scripts/setup-linux.sh
       linux_build_command: ./scripts/test.sh
       # Windows
+      windows_exclude_swift_versions: '[{"swift_version": "nightly-6.1"}]'  # Missing https://github.com/swiftlang/swift/pull/80144
       windows_env_vars: |
         CI=1
         VSCODE_SWIFT_VSIX_ID=${{needs.package.outputs.artifact-id}}