Update python-publish.yml

Author: andrewkern

.github/workflows/python-publish.yml

@@ -34,7 +34,7 @@ jobs:
           pip install --upgrade pip build
           python -m build --sdist
       - name: Upload sdist
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: sdist
           path: dist