fix(ci/release/publish): update testpypi endpoint

Author: hleb-rubanau

.github/workflows/release.yml

@@ -142,4 +142,4 @@ jobs:
         if:   needs.setup.outputs.publish_env=='testpypi'
         uses: pypa/gh-action-pypi-publish@release/v1
         with:
-          repository-url: https://test.pypi.org/uploads/legacy
+          repository-url: https://test.pypi.org/legacy