Build(deps): Bump sphinx from 7.2.6 to 7.4.7 (#691)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 7.2.6 to 7.4.7.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/v7.4.7/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v7.2.6...v7.4.7)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-version: 7.4.7
  dependency-type: direct:production
  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/doc.txt

@@ -1,5 +1,5 @@
 -r towncrier.txt
 aiohttp-theme==0.1.7
-sphinx==7.2.6
+sphinx==7.4.7
 sphinxcontrib-spelling==8.0.0; platform_system!="Windows"
 sphinxcontrib-towncrier