Revert version of upload/download artifact to v3 again

Author: mwydmuch

.github/workflows/build-and-test-wheels.yml

@@ -167,7 +167,7 @@ jobs:
     if: github.event_name == 'release' && github.event.action == 'published'
     steps:
       - name: Download all dists
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v3
         with:
           # Unpacks default artifact into dist/
           # If `name: artifact` is omitted, the action will create extra parent dir

.github/workflows/build-and-test-windows-wheels.yml

@@ -156,7 +156,7 @@ jobs:
     if: github.event_name == 'release' && github.event.action == 'published'
     steps:
       - name: Download all dists
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v3
         with:
             # Unpacks default artifact into dist/
             # If `name: artifact` is omitted, the action will create extra parent dir