Bump sphinx from 4.5.0 to 7.2.6

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 4.5.0 to 7.2.6.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v4.5.0...v7.2.6)

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

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

requirements/local.txt

@@ -14,7 +14,7 @@ responses==0.21.0  # https://github.com/getsentry/responses - for mocking HTTP r
 
 # Documentation
 # ------------------------------------------------------------------------------
-sphinx==4.5.0  # https://github.com/sphinx-doc/sphinx
+sphinx==7.2.6  # https://github.com/sphinx-doc/sphinx
 sphinx-autobuild==2021.3.14 # https://github.com/GaretJax/sphinx-autobuild
 
 # Code quality