fix action input

Author: l

.github/workflows/validate-pr-metadata.yml

@@ -25,8 +25,8 @@ jobs:
     steps:
       - name: checkout base branch
         uses: actions/checkout@v7
-        allow-unsafe-pr-checkout: true
         with:
+          allow-unsafe-pr-checkout: true
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Get changed files
         id: changed-files