hf: add checkout to container image workflow

.gitea/workflows/ci.yml

@@ -71,6 +71,9 @@ jobs:
     runs-on: ubuntu-latest
     if: startsWith(github.ref, 'refs/tags/v')  # Only run on tag push
     steps:
+      - name: Checkout Code
+        uses: actions/checkout@v4
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3