ci: Port release updater update master as well (#7650)

.github/workflows/release_branch_updater.yml

@@ -3,13 +3,14 @@ name: Port repo release update
 on:
   push:
     branches:
+      - master
       - 'release/v*' # on release branches
   workflow_dispatch: # allow manual triggering
 
 # https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions#concurrency
 # Ensure that only one commit will be running tests at a time on each push
 concurrency:
-  group: ${{ github.ref }}-${{ github.workflow }} 
+  group: ${{ github.workflow }}
   cancel-in-progress: true
 
 jobs: