Revert "Run format workflow on Windows instead of macOS"

This reverts commit dd10a8a.

.github/workflows/format-code.yml

@@ -12,7 +12,7 @@ jobs:
     name: Format Code
     # Run on 'macos' because Linux is missing the `ios` workload: https://github.com/dotnet/runtime/issues/85505
     # Pin macos to get the version of XCode that we need: https://github.com/actions/runner-images/issues/10703
-    runs-on: windows-latest
+    runs-on: macos-15
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -40,5 +40,4 @@ jobs:
       # we need to pass the current branch, otherwise we can't commit the changes.
       # GITHUB_HEAD_REF is the name of the head branch. GitHub Actions only sets this for PRs.
       - name: Commit Formatted Code
-        shell: pwsh
-        run: pwsh ./scripts/commit-formatted-code.ps1 $GITHUB_HEAD_REF
+        run: ./scripts/commit-formatted-code.sh $GITHUB_HEAD_REF