👷 Fix smokeshow, checkout files on CI (#243)

Author: tiangolo

.github/workflows/smokeshow.yml

@@ -16,6 +16,7 @@ jobs:
     if: ${{ github.event.workflow_run.conclusion == 'success' }}
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
           python-version: '3.9'