👷 Fix smokeshow, checkout files on CI (#1136)

Author: tiangolo

.github/workflows/smokeshow.yml

@@ -15,8 +15,8 @@ jobs:
   smokeshow:
     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'