.github: add ready_for_review trigger for housekeeping workflow (cosm…

…os#1221)

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.github/workflows/housekeeping.yml

@@ -4,7 +4,7 @@ on:
   issues:
     types: [opened]
   pull_request_target:
-    types: [opened]
+    types: [opened, ready_for_review]
 
 jobs:
   issue-management: