don't upgrade setuptools

.github/workflows/wheels.yml

@@ -136,7 +136,7 @@ jobs:
         run: |
           python -m venv sdist_venv
           source sdist_venv/bin/activate
-          python -m pip install --upgrade pip setuptools
+          python -m pip install --upgrade pip # setuptools
           python -m pip install *.gz
           # The cd is to move us away from
           # the project repo root where the module is not built