ci(test): Support merge queues

https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/configuring-pull-request-merges/managing-a-merge-queue#triggering-merge-group-checks-with-github-actions
https://docs.github.com/en/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows#merge_group

Author: YDX-2147483647

.github/workflows/test.yaml

@@ -7,6 +7,8 @@ on:
   pull_request:
     branches:
       - main
+  merge_group:
+    types: [checks_requested]
 
 jobs:
   build-latex: