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]

pyproject.toml

@@ -8,7 +8,7 @@ dependencies = [
     "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",