Bump authlib from 0.15.3 to 1.6.9

Bumps [authlib](https://github.com/authlib/authlib) from 0.15.3 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@v0.15.3...v1.6.9)

---
updated-dependencies:
- dependency-name: authlib
  dependency-version: 1.6.9
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

poetry.lock

@@ -8,7 +8,7 @@ package-mode = false
 
 [tool.poetry.dependencies]
 python = "^3.11"
-authlib = "0.15.3"
+authlib = "1.6.9"
 certifi = "2023.7.22"
 cffi = "1.14.5"
 chardet = "4.0.0"