Bump authlib from 1.5.2 to 1.6.5

Bumps [authlib](https://github.com/authlib/authlib) from 1.5.2 to 1.6.5.
- [Release notes](https://github.com/authlib/authlib/releases)
- [Changelog](https://github.com/authlib/authlib/blob/main/docs/changelog.rst)
- [Commits](authlib/authlib@v1.5.2...v1.6.5)

---
updated-dependencies:
- dependency-name: authlib
  dependency-version: 1.6.5
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -1,7 +1,7 @@
 aiofiles==24.1.0
 annotated-types==0.7.0
 anyio==4.9.0
-Authlib==1.5.2
+Authlib==1.6.5
 cachetools==5.5.2
 certifi==2025.4.26
 cffi==1.17.1