Bump sphinx from 5.3.0 to 6.2.1 (#491)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 5.3.0 to 6.2.1.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES)
- [Commits](sphinx-doc/sphinx@v5.3.0...v6.2.1)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

poetry.lock

@@ -33,7 +33,7 @@ certifi = ">=2022.5.18,<2024.0.0"
 black = "^23.7.0"
 mypy = "^1.4"
 types-urllib3 = "^1.26.25"
-Sphinx = "^5.3.0"
+Sphinx = "^6.2.1"
 sphinx-rtd-theme = "^1.2.2"
 # keep this in sync with docs/requirements.txt for readthedocs.org
 sphinx-autodoc-typehints = "^1.23.0"