Block release PR flow if release merge (#6384)

Author: hsubox76

.github/workflows/release-pr.yml

@@ -10,6 +10,7 @@ jobs:
   release:
     name: Create Release PR
     runs-on: ubuntu-latest
+    if: ${{ !startsWith(github.event.head_commit.message, 'Version Packages (#') }}
     steps:
       - name: Checkout Repo
         uses: actions/checkout@master