Bump authlib from 1.2.1 to 1.3.1

Bumps [authlib](https://github.com/lepture/authlib) from 1.2.1 to 1.3.1.
- [Release notes](https://github.com/lepture/authlib/releases)
- [Changelog](https://github.com/lepture/authlib/blob/master/docs/changelog.rst)
- [Commits](lepture/authlib@v1.2.1...v1.3.1)

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

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

requirements.txt

@@ -1,7 +1,7 @@
 anyio==3.7.1
 asgiref==3.6.0
 attrs==19.3.0
-Authlib==1.2.1
+Authlib==1.3.1
 certifi==2023.7.22
 cffi==1.15.1
 charset-normalizer==3.2.0