Update sphinx-autoapi requirement from 2.0.1 to 2.1.0 (#161)

Updates the requirements on [sphinx-autoapi](https://github.com/readthedocs/sphinx-autoapi) to permit the latest version.
- [Release notes](https://github.com/readthedocs/sphinx-autoapi/releases)
- [Changelog](https://github.com/readthedocs/sphinx-autoapi/blob/main/CHANGELOG.rst)
- [Commits](readthedocs/sphinx-autoapi@v2.0.1...v2.1.0)

---
updated-dependencies:
- dependency-name: sphinx-autoapi
  dependency-type: direct:development
...

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

pyproject.toml

@@ -50,6 +50,6 @@ optional = true
 
 [tool.poetry.group.docs.dependencies]
 sphinx="6.1.3"
-sphinx-autoapi="2.0.1"
+sphinx-autoapi="2.1.0"
 sphinx-copybutton="0.5.1"
 sphinx-rtd-theme="1.2.0"