bugfix - fix checks failing if in other repo [part 2]

.github/workflows/yaml_checks.yaml

@@ -26,8 +26,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
         with:
-          ref: ${{ github.head_ref }}
-          fetch-depth: 0
+          ref: ${{ github.event.pull_request.head.sha }}
           show-progress: false
       - name: Check Yaml Files
         run: |