Bump sphinx-autodoc-typehints from 1.11.1 to 1.12.0

Bumps [sphinx-autodoc-typehints](https://github.com/agronholm/sphinx-autodoc-typehints) from 1.11.1 to 1.12.0.
- [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@1.11.1...1.12.0)

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

requirements/doc.txt

@@ -1,4 +1,4 @@
 sphinx==4.0.2
 sphinxcontrib-asyncio==0.3.0
 alabaster==0.7.12
-sphinx-autodoc-typehints==1.11.1
+sphinx-autodoc-typehints==1.12.0