chore(deps): bump authlib in /tools/tokenserver/loadtests

Bumps [authlib](https://github.com/authlib/authlib) from 1.6.5 to 1.6.6.
- [Release notes](https://github.com/authlib/authlib/releases)
- [Changelog](https://github.com/authlib/authlib/blob/main/docs/changelog.rst)
- [Commits](authlib/authlib@v1.6.5...v1.6.6)

---
updated-dependencies:
- dependency-name: authlib
  dependency-version: 1.6.6
  dependency-type: direct:production
...

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

Author: dependabot[bot]

tools/tokenserver/loadtests/poetry.lock

@@ -14,7 +14,7 @@ requires-python = ">=3.10,<3.12"
 package-mode = false 
 
 [tool.poetry.dependencies]
-authlib = "^1.6.5"
+authlib = "^1.6.6"
 cryptography = "^45.0.4"
 locust = "^2.37.10"
 pybrowserid = "^0.14.0"