Python dependency: Bump sphinx from 7.4.7 to 9.1.1

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 7.4.7 to 9.1.1.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](https://github.com/sphinx-doc/sphinx/compare/v7.4.7...v9.1.1)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-version: 9.1.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

tools/requirements.txt

@@ -3,5 +3,5 @@ requests>=2.34.2; python_version > '3.9'
 requests[security]>=2.32.5,<2.33; python_version <= '3.9'
 requests[security]>=2.34.2; python_version > '3.9'
 safety>=3.8.1
-Sphinx==7.4.7
+Sphinx==9.1.1
 sphinxcontrib-youtube==1.5.0