Revert "Bump actions/download-artifact from 3 to 4"

.github/workflows/pypi.yml

@@ -60,7 +60,7 @@ jobs:
     needs: [make_sdist,build_wheels]
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v3
         with:
           name: artifact
           path: dist
@@ -83,7 +83,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.event_name == 'release' && github.event.action == 'published'
     steps:
-    - uses: actions/download-artifact@v4
+    - uses: actions/download-artifact@v3
       with:
         name: artifact
         path: dist

.github/workflows/test.yml

@@ -256,7 +256,7 @@ jobs:
           python -m pip install -U coverage>=5.1 coveralls
 
       - name: Download coverage file
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v3
         with:
           name: coverage
           path: coverage