fix(ci): emit ci / ci on the merge-queue branch

.github/workflows/ci.yaml

@@ -3,6 +3,12 @@ on:
   pull_request:
     branches: [main]
   merge_group:
+    types: [checks_requested]
+  # merge_group Actions did not start for #41, so `ci / ci` stayed expected
+  # on the queue SHA. The queue branch push reports the same check.
+  push:
+    branches:
+      - "gh-readonly-queue/**"
 
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   contents: read