ci: correctly checkout repo before using local action

Author: josephperrott

.github/workflows/dev-infra.yml

@@ -15,6 +15,7 @@ jobs:
     if: github.event_name == 'issues'
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - uses: ./github-actions/issue-labeling
         with:
           angular-robot-key: ${{ secrets.ANGULAR_ROBOT_PRIVATE_KEY }}