updated github action download artifact (#172)

Author: Hampus Malmberg

.github/workflows/pypi-deployment.yml

@@ -39,7 +39,7 @@ jobs:
     # alternatively, to publish when a GitHub Release is created, use the following rule:
     # if: github.event_name == 'release' && github.event.action == 'published'
     steps:
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4
         with:
           name: artifact
           path: dist