Bump authlib from 1.6.7 to 1.6.9

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: direct:production
...

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

Author: dependabot[bot]

poetry.lock

@@ -31,7 +31,7 @@ semver = "^2.9.0"
 gitpython = "^3.0.5"
 pytest-ordering = "^0.6"
 pytest-nhsd-apim = "^3.3.9"
-authlib = "^1.6.7"
+authlib = "^1.6.9"
 urllib3 = "^2.6.3"
 setuptools = "^80.0.1"
 cryptography = "^46.0.5"