Update to different publishing name due to issue with permissions in test.pypi.org

Author: marthacryan

.github/workflows/test-release.yml

@@ -49,7 +49,7 @@ jobs:
 
     environment:
       name: testpypi
-      url: https://test.pypi.org/p/plotly
+      url: https://test.pypi.org/p/plotly-testing
 
     permissions:
       id-token: write  # IMPORTANT: mandatory for trusted publishing