Update sphinx requirement from <5.0.2,>=1.8.1 to >=1.8.1,<5.0.3 (#804)
Update sphinx requirement from <5.0.2,>=1.8.1 to >=1.8.1,<5.0.3 (#804)

Updates the requirements on [sphinx](https://github.com/sphinx-doc/sphinx) to permit the latest version.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/5.x/CHANGES)
- [Commits](https://github.com/sphinx-doc/sphinx/compare/v1.8.1...v5.0.2)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
aio-libs/aiomysql