Downgrade artifact uploader as test

Author: mvantellingen

.github/workflows/python-test.yml

@@ -52,7 +52,7 @@ jobs:
     - name: Prepare artifacts
       run: mkdir .coverage-data && mv .coverage.* .coverage-data/
 
-    - uses: actions/upload-artifact@v4
+    - uses: actions/upload-artifact@v3
       with:
         name: coverage-data
         path: .coverage-data/
@@ -62,7 +62,7 @@ jobs:
     needs: [test]
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/download-artifact@v4
+    - uses: actions/download-artifact@v3
       with:
         name: coverage-data
         path: .