Fix actions workflow

Author: deep1401

.github/workflows/python-package.yml

@@ -61,6 +61,8 @@ jobs:
       # url: https://pypi.org/project/YOURPROJECT/${{ github.event.release.name }}
 
     steps:
+      - uses: actions/checkout@v4
+
       - name: Retrieve release distributions
         uses: actions/download-artifact@v4
         with: