TEMPORARY: run on push to this branch

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Author: soutaro

.github/workflows/build-gems.yml

@@ -14,6 +14,12 @@ name: Build gems
 
 on:
   workflow_dispatch:
+  # TEMPORARY: remove before merging. `workflow_dispatch` only shows up in the
+  # Actions UI once the file is on the default branch, so this is the only way
+  # to exercise the workflow from the pull request.
+  push:
+    branches:
+      - build-gems-workflow
 
 permissions:
   contents: read