Bump authlib from 1.2.0 to 1.2.1 (#15864)

Bumps [authlib](https://github.com/lepture/authlib) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/lepture/authlib/releases)
- [Changelog](https://github.com/lepture/authlib/blob/master/docs/changelog.rst)
- [Commits](lepture/authlib@v1.2.0...v1.2.1)

---
updated-dependencies:
- dependency-name: authlib
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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