Bump sphinx from 8.2.1 to 8.2.3

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](sphinx-doc/sphinx@v8.2.1...v8.2.3)

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

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

Author: dependabot[bot]

docs/requirements.txt

@@ -1 +1 @@
-sphinx == 8.2.1
+sphinx == 8.2.3