update plotting_info so that e.g. chart ids are included

.github/workflows/update_data.yml

@@ -79,7 +79,8 @@ jobs:
 
       - name: Commit and push if there are changes
         run: |
-          git add data/* plotting_info.json
+          git add data/* 
+                    git status --short | grep "plotting_info.json" && git add plotting_info.json
           git commit -m "Add/update Vantage6 result" || exit 0  # Exit gracefully if no changes
           git push