Use correct URL for test-pypi for publishing test wheels (#608)

Author: eriknw

.github/workflows/publish_pypi.yml

@@ -71,6 +71,7 @@ jobs:
       - name: Publish to Test-PyPI
         uses: pypa/[email protected]
         with:
+          repository-url: https://test.pypi.org/legacy/
           print-hash: true
           verbose: true