Using a user-provided API token for authentication against https://upload.pypi.org/legacy/

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2, actions/cache@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

Trusted Publishers allows publishing packages to PyPI from automated environments like GitHub Actions without needing to use username/password combinations or API tokens to authenticate with PyPI. Read more: https://docs.pypi.org/trusted-publishers