Build(deps): Bump sphinx from 3.0.0 to 3.0.1

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 3.0.0 to 3.0.1.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/3.x/CHANGES)
- [Commits](sphinx-doc/sphinx@v3.0.0...v3.0.1)

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

requirements/doc.txt

@@ -1,4 +1,4 @@
-sphinx==3.0.0
+sphinx==3.0.1
 sphinxcontrib-asyncio==0.2.0
 pygments>=2.1
 aiohttp-theme==0.1.6