implement hacky workaround so downstreams runs in the merge queue. (#…

…12937)

.github/workflows/downstreams.yml

@@ -8,7 +8,7 @@ on:
       - 'FEATURE-BRANCH-*'
   merge_group:
     types: [checks_requested]
-
+  pull_request:
 
 concurrency:
   group: ${{ github.event_name == 'merge_group' && format('merge-group-{0}', github.event.merge_group.head_sha) || github.event_name == 'pull_request' && format('pr-{0}', github.event.pull_request.number) || format('commit-{0}', github.sha) }}