Cancel duplicate checks release notes actions

The action to check release notes is triggered by each edit
to the description. For example, selecting the check boxes counts
each as a single change. It triggers an action for each selection.
Thus, up to 6 actions to check the release notes might be queued.
This change cancels other queued actions for the same PR.

Author: czentgr

.github/workflows/release-notes-check.yml

@@ -10,6 +10,9 @@ env:
 jobs:
   check_release_note:
     runs-on: ubuntu-latest
+    concurrency:
+      group: ${{ github.workflow }}-check-release-note-${{ github.event.pull_request.number }}
+      cancel-in-progress: true
     steps:
       - name: Checkout
         uses: actions/checkout@v4