chore(deps): bump sphinx from 7.3.7 to 7.4.6

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 7.3.7 to 7.4.6.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v7.3.7...v7.4.6)

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

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

requirements.txt

@@ -6,5 +6,5 @@
 
 antsibull-docs >= 2.0.0, < 3.0.0
 ansible-pygments==0.1.1
-sphinx==7.3.7
+sphinx==7.4.6
 sphinx-ansible-theme==0.10.3