Bump sphinx from 5.0.1 to 5.1.0 (#492)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 5.0.1 to 5.1.0.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/5.x/CHANGES)
- [Commits](sphinx-doc/sphinx@v5.0.1...v5.1.0)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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

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

docs-requirements.txt

@@ -42,7 +42,7 @@ requests==2.28.1
     # via sphinx
 snowballstemmer==2.2.0
     # via sphinx
-sphinx==5.0.1
+sphinx==5.1.0
     # via sphinxcontrib-trio
 sphinxcontrib-applehelp==1.0.2
     # via sphinx