Enable automerge to release branch on release

.github/workflows/release.yml

@@ -10,6 +10,18 @@ env:
   GO_VERSION: '1.20'
 
 jobs:
+  merge_release:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Merge development -> staging
+      uses: devmasx/merge-branch@master
+      with:
+        type: now
+        from_branch: main
+        target_branch: release
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+
   build_linux:
     runs-on: ubuntu-latest
     steps: