Update prettier.yml

Author: davidjharder

.github/workflows/prettier.yml

@@ -9,8 +9,10 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
         with:
-          ref: ${{ github.head_ref }}
+          ref: ${{ github.event.pull_request.head.ref }}
+          repository: ${{ github.event.pull_request.head.repo.full_name }}
           fetch-depth: 0
+
       - name: Prettify code
         uses: creyD/[email protected]
         with: