Bump authlib from 1.6.7 to 1.6.9 (#199)

Bumps [authlib](https://github.com/authlib/authlib) from 1.6.7 to 1.6.9.
- [Release notes](https://github.com/authlib/authlib/releases)
- [Changelog](https://github.com/authlib/authlib/blob/main/docs/changelog.rst)
- [Commits](authlib/authlib@v1.6.7...v1.6.9)

---
updated-dependencies:
- dependency-name: authlib
  dependency-version: 1.6.9
  dependency-type: indirect
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Nikhil Navakiran <nikhil.navakiran@gmail.com>

Author: dependabot[bot]