chore: remove example.py and update PyPI publish workflow secret name

Author: jasonmei012

.github/workflows/publish-pypi.yml

@@ -29,4 +29,4 @@ jobs:
         uses: pypa/gh-action-pypi-publish@release/v1
         with:
           user: __token__
-          password: ${{ secrets.PYPI_API_TOKEN }}
+          password: ${{ secrets.PYPI_PASSWORD }}