Bump sphinx from 8.2.1 to 8.2.3 in /docs (#4603)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 8.2.1 to 8.2.3.
- [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/v8.2.1...v8.2.3

)

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

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