fix deploy-preview workflow

Author: tyrasd

.github/workflows/deploy-preview.yml

@@ -12,6 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.conclusion == 'success'}}
     steps:
+      - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
           node-version: '18'