Fix deploy workflow to PyPI

Author: diegoferigo

.github/workflows/python.yml

@@ -106,6 +106,9 @@ jobs:
 
     steps:
 
+      - uses: actions/checkout@master
+      - run: git fetch --prune --unshallow    
+
       - uses: actions/download-artifact@v2
         with:
           name: dist