test difference between branches

.github/workflows/merge-release-changes-to-main.yml

@@ -27,6 +27,14 @@ jobs:
               run: |
                 git checkout -b ${{ env.working_branch }} ${{ env.starting_branch }}
                 git push --set-upstream origin ${{ env.working_branch }}
+            - name: Check for differences between release and main
+              run: |
+                git fetch origin ${{ env.base_branch }}
+                DIFF=$(git diff origin/${{ env.base_branch }}...${{ env.working_branch }})
+                if [ -z "$DIFF" ]; then
+                  echo "No differences found. Exiting without creating a pull request."
+                  exit 0
+                fi
             - name: Create a pull request
               uses: peter-evans/create-pull-request@v4
               with: