How to make a release

Following https://github.com/codespell-project/codespell/pull/2523:

1. Create a published release on GitHub:

   1. Use the form v2.2.1 for the tag and the title
   2. Use autogenerated GitHub release notes

This should trigger .github/workflows/release.yml to push to PyPI, and then later conda-forge tickbot should automatically update as well.