Bump sphinx from 4.1.2 to 4.2.0 (#828)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 4.1.2 to 4.2.0.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/4.x/CHANGES)
- [Commits](sphinx-doc/sphinx@v4.1.2...v4.2.0)

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

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

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

Author: dependabot[bot]

requirements_dev.txt

@@ -12,7 +12,7 @@ pytest-mock<3.6.2
 recommonmark==0.7.1
 requests==2.26.0
 requests-mock==1.9.3
-sphinx==4.1.2
+sphinx==4.2.0
 sphinx-rtd-theme==0.5.2
 tqdm==4.62.2
 websocket-client==1.2.1