Potential fix to upload/download artifacts.

.github/workflows/build-test-pypi.yml

@@ -85,6 +85,7 @@ jobs:
       - name: Upload wheels to artifact container
         uses: actions/upload-artifact@v4
         with:
+          name: dist-${{ matrix.os }}-${{ matrix.python }}
           path: wheelhouse/*.whl
 
   upload_all:
@@ -94,7 +95,8 @@ jobs:
     - name: Get SDist and wheels from artifact container
       uses: actions/download-artifact@v4
       with:
-        name: artifact
+        pattern: dist-*
+        merge-multiple: true
         path: dist
     - name: Publish wheels to Test PyPI
       uses: pypa/gh-action-pypi-publish@v1.10.1