print out diffs

Signed-off-by: Chengxuan Xing <[email protected]>

.github/workflows/e2e.yaml

@@ -63,6 +63,8 @@ jobs:
           if [[ -n $(git status --porcelain) ]]; then
             echo "Error: 'npm run gen' caused changes in the repository, please run the command locally to commit in all changes."
             git status --porcelain
+            echo "Detailed changes:"
+            git diff
             exit 1
           fi