chore(deps): Bump sphinx-autodoc-typehints from 1.20.2 to 1.21.1 (#1879)

Bumps [sphinx-autodoc-typehints](https://github.com/tox-dev/sphinx-autodoc-typehints) from 1.20.2 to 1.21.1.
- [Release notes](https://github.com/tox-dev/sphinx-autodoc-typehints/releases)
- [Changelog](https://github.com/tox-dev/sphinx-autodoc-typehints/blob/main/CHANGELOG.md)
- [Commits](tox-dev/sphinx-autodoc-typehints@1.20.2...1.21.1)

---
updated-dependencies:
- dependency-name: sphinx-autodoc-typehints
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements/docs.txt

@@ -5,4 +5,4 @@ myst-parser==0.18.1
 sphinxext-opengraph==0.7.5
 sphinx-copybutton==0.5.1
 furo@ git+https://github.com/BobDotCom/furo@temp
-sphinx-autodoc-typehints==1.20.2
+sphinx-autodoc-typehints==1.21.1