Update GitLab Upload Artifact action to v4

Author: acdha

.github/workflows/pypi-release.yml

@@ -12,7 +12,7 @@ jobs:
             - name: Build sdist
               run: pipx run build --sdist
 
-            - uses: actions/upload-artifact@v3
+            - uses: actions/upload-artifact@v4
               with:
                   path: dist/*.tar.gz