fix change auto merge branch name

.github/workflows/auto-pr.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Create Pull Request
         uses: peter-evans/create-pull-request@v3
         with:
-          branch: auto-rel-4-0-merge-pr-${{github.run_number}}
+          branch: auto-merge/rel-4-0/${{github.run_number}}
           title: Merge branch rel-4.1 with ${{github.ref}}
           body: This PR generated automatically to merge rel-4.1 with rel-4.0. Please review the changed files before merging to prevent any errors that may occur.
           reviewers: ${{github.actor}}