fix: add check for existing PR before creating Docker version update PR

Author: gounthar

.github/workflows/github-docker-registry-push.yml

@@ -65,14 +65,27 @@ jobs:
           if git diff --cached --quiet; then
             echo "No changes to docker-versions.txt, skipping PR creation"
           else
-            git commit -m "chore: update Docker versions"
-            git push origin "$BRANCH_NAME"
-            # Create PR with explicit title and body instead of --fill
-            gh pr create \
-              --title "chore: update Docker versions" \
-              --body "Automated update of docker-versions.txt with current Docker and Docker Compose versions." \
-              --base main \
-              --head "$BRANCH_NAME"
+            # Check if an open PR already exists
+            EXISTING_PR=$(gh pr list --base main --state open --search "chore: update Docker versions in:title" --json number --jq '.[0].number // empty')
+            if [ -n "$EXISTING_PR" ]; then
+              echo "Open PR #$EXISTING_PR already exists for Docker version updates, skipping PR creation"
+              echo "You can view it at: $(gh pr view $EXISTING_PR --json url --jq '.url')"
+            else
+              git commit -m "chore: update Docker versions"
+              git push origin "$BRANCH_NAME"
+              # Create PR with explicit title and body instead of --fill
+              gh pr create \
+                --title "chore: update Docker versions" \
+                --body "Automated update of docker-versions.txt with current Docker and Docker Compose versions.
+
+**Changes:**
+- Updated Docker version information
+- Updated Docker Compose version information
+
+This PR only contains changes to \`docker-versions.txt\` and no other files." \
+                --base main \
+                --head "$BRANCH_NAME"
+            fi
           fi
 
       - name: Check for Dockerfile and context changes