Fix Prettify (#2389)

Author: pfefferle

.github/workflows/format.yml

@@ -13,7 +13,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v5
         with:
-          ref: ${{ github.event.pull_request.head.sha }}
+          ref: ${{ github.event.pull_request.head.ref }}
 
       - name: Setup Node.js
         uses: actions/setup-node@v6