Bump sphinx-autodoc-typehints from 1.9.0 to 1.10.0 in /docs

Bumps [sphinx-autodoc-typehints](https://github.com/agronholm/sphinx-autodoc-typehints) from 1.9.0 to 1.10.0.
- [Release notes](https://github.com/agronholm/sphinx-autodoc-typehints/releases)
- [Changelog](https://github.com/agronholm/sphinx-autodoc-typehints/blob/master/CHANGELOG.rst)
- [Commits](agronholm/sphinx-autodoc-typehints@1.9.0...1.10.0)

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

docs/requirements.txt

@@ -2,7 +2,7 @@
 # to generate documentation.
 
 sphinx==2.2.1
-sphinx_autodoc_typehints==1.9.0
+sphinx_autodoc_typehints==1.10.0
 sphinxcontrib-mermaid==0.3.1
 sphinx-typlog-theme==0.8.0
 recommonmark==0.6.0