Bump sphinx from 2.0.0 to 2.0.1 in /docs (#64)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 2.0.0 to 2.0.1.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES)
- [Commits](sphinx-doc/sphinx@v2.0.0...v2.0.1)

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

Author: dependabot[bot]

docs/requirements.txt

@@ -1,7 +1,7 @@
 # This file is used to setup env
 # to generate documentation.
 
-sphinx==2.0.0
+sphinx==2.0.1
 sphinx_autodoc_typehints==1.6.0
 sphinxcontrib-mermaid==0.3.1
 sphinx-typlog-theme==0.7.2