ci: Add workaround to CodeQL status checks

CodeQL and merge queues don't play along very well. That's because
CodeQL doesn't report status to the merge queue, which ends up blocking
the queue forever.

Add this small workaround which allows us to turn on the merge queue
again.
This commit is contained in:
Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f