Update python-publish.yml

Try using `verbose: true` to understand the HTTP failure message

Author: lydia-duncan

.github/workflows/python-publish.yml

@@ -71,3 +71,4 @@ jobs:
         user: __token__
         password: ${{ secrets.TEST_PYPI_API_TOKEN }}
         repository-url: https://test.pypi.org/legacy/
+        verbose: true