update artifact version

Author: alegresor

.github/workflows/wheels.yml

@@ -19,7 +19,7 @@ jobs:
       run: python -m pip install --upgrade setuptools wheel
     - name: Build wheels
       run: python setup.py bdist_wheel
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v4
       with:
         name: dist
         path: dist