fix: github action to open a PR

Author: barbaraperic

.github/workflows/update-versions.yml

@@ -50,6 +50,6 @@ jobs:
             Automated PR to update Lotus version references to ${{ env.LATEST_VERSION }}
             
             This PR was automatically generated by GitHub Actions.
-          branch: update-lotus-version
+          branch: update-lotus-version-${{ env.LATEST_VERSION }}
           base: main
           delete-branch: true