Bump sphinx from 3.5.1 to 3.5.2 in /ManualGenerator
Bump sphinx from 3.5.1 to 3.5.2 in /ManualGenerator

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 3.5.1 to 3.5.2.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/3.x/CHANGES)
- [Commits](https://github.com/sphinx-doc/sphinx/compare/v3.5.1...v3.5.2)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
y-iihoshi/REIMU_Plugins_V2,y-iihoshi/REIMU_Plugins_V2