only required checks

Author: ralfhandl

.github/workflows/sync-dev-to-vX.Y-dev.yaml

@@ -49,7 +49,7 @@ jobs:
               --body "Merge \`$HEAD\` into \`$BASE\`.")
             echo "PR to sync $DEV_BRANCH: $PR"
             
-            gh pr checks $PR --watch
+            gh pr checks $PR --watch --required --fail-fast || continue
             gh pr merge $PR --merge --admin
           done
         env: