fix(ci): exclude .git from the generated artifact

The artifact's pack file has the same name as the read-only one in the publish job's checkout, so extracting over it fails with EACCES.

Author: ariesclark

.github/workflows/ci.yaml

@@ -63,7 +63,9 @@ jobs:
       - uses: actions/upload-artifact@v7
         with:
           name: python-generated
-          path: .
+          path: |
+            .
+            !.git/**
           include-hidden-files: true
 
   build: