build(deps): bump sphinx from 6.2.0 to 7.2.6

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 6.2.0 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@v6.2.0...v7.2.6)

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

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

Author: dependabot[bot]

docs/requirements.txt

@@ -9,7 +9,7 @@ pytz==2023.3.post1
 pyyaml==5.4.1
 requests==2.31.0
 snowballstemmer==2.2.0
-sphinx==6.2.0
+sphinx==7.2.6
 sphinx-jsonschema==1.19.1
 sphinx-rtd-theme==1.3.0
 sphinxcontrib-applehelp==1.0.4