Fix auto commit of copyright headers (#2948)

* fix: 🐛 Fix copyright header updates failing in CI

.github/workflows/copyright-validate.yaml

@@ -7,6 +7,10 @@ jobs:
       contents: write
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        # Ref and repository aren't normally needed, this is a workaround for a bug in auto commit
+        with:
+          ref: ${{ github.event.pull_request.head.ref }}
+          repository: ${{ github.event.pull_request.head.repo.full_name }}
       - uses: hashicorp/setup-copywrite@32638da2d4e81d56a0764aa1547882fc4d209636 # v1.1.3
       - name: Add missing Copyright Headers
         run: copywrite headers