Clarify upload/download actions and bump versions

Not using latest setup-python@v4 as it wants explicit version,
making scripts too verbose, so sticking to `setup-python@v3`
that allows to use default Python

Co-authored-by: Matthieu Darbois <mayeut@users.noreply.github.com>

examples/github-deploy.yml

@@ -26,6 +26,7 @@ jobs:
 
       - uses: actions/upload-artifact@v3
         with:
+          name: wheels
           path: ./wheelhouse/*.whl
 
   build_sdist:
@@ -39,6 +40,7 @@ jobs:
 
       - uses: actions/upload-artifact@v3
         with:
+          name: wheels
           path: dist/*.tar.gz
 
   upload_pypi:
@@ -51,7 +53,8 @@ jobs:
     steps:
       - uses: actions/download-artifact@v3
         with:
-          name: artifact
+          name: wheels
+          # unpack all artifacts into dist/
           path: dist
 
       - uses: pypa/gh-action-pypi-publish@v1.5.0