[dependabot] Chore: Bump sphinx-autoapi from 3.3.2 to 3.4.0

Bumps [sphinx-autoapi](https://github.com/readthedocs/sphinx-autoapi) from 3.3.2 to 3.4.0.
- [Release notes](https://github.com/readthedocs/sphinx-autoapi/releases)
- [Changelog](https://github.com/readthedocs/sphinx-autoapi/blob/main/CHANGELOG.rst)
- [Commits](readthedocs/sphinx-autoapi@v3.3.2...v3.4.0)

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

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

docs/requirements.txt

@@ -1,5 +1,5 @@
 sphinx>=6,<9
-sphinx-autoapi==3.3.2
+sphinx-autoapi==3.4.0
 sphinx-autodoc-typehints
 sphinx-rtd-theme==3.0.1
 tox