Bump joserfc from 0.9.0 to 1.6.3 in /requirements

Bumps [joserfc](https://github.com/authlib/joserfc) from 0.9.0 to 1.6.3.
- [Release notes](https://github.com/authlib/joserfc/releases)
- [Changelog](https://github.com/authlib/joserfc/blob/main/docs/changelog.rst)
- [Commits](authlib/joserfc@0.9.0...1.6.3)

---
updated-dependencies:
- dependency-name: joserfc
  dependency-version: 1.6.3
  dependency-type: indirect
...

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

Author: dependabot[bot]