Merge pull request #10057 from id/ci-build-slim-packages-for-release-branch

ci: build slim packages on push to release-50

.github/workflows/build_slim_packages.yaml

@@ -8,6 +8,7 @@ on:
   push:
     branches:
       - master
+      - release-50
   pull_request:
     # GitHub pull_request action is by default triggered when
     # opened reopened or synchronize,