Upgrading to upload/download-artifact v4

.github/workflows/cibuildwheels.yml

@@ -67,8 +67,9 @@ jobs:
         uses: pypa/[email protected]
 
       - name: Upload wheels
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
+          name: wheels-${{ matrix.runs-on }}
           path: ./wheelhouse/*.whl
 
 
@@ -99,6 +100,7 @@ jobs:
       - name: Upload sdist package
         uses: actions/upload-artifact@v4
         with:
+          name: wheels-source
           path: dist/*.tar.gz
 
       - name: Build building extension from sdist package
@@ -120,10 +122,10 @@ jobs:
     # Only upload wheels when tagging (typically a release)
     if: startsWith(github.event.ref, 'refs/tags')
     steps:
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
-          name: artifact
-          path: dist
+          pattern: wheels-*   # Download the wheels artifact
+          merge-multiple: true  # Merge all the wheels artifacts into one directory
 
       - uses: pypa/gh-action-pypi-publish@release/v1
         with: