Bump sphinx from 9.0.4 to 9.1.0 (#1169)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 9.0.4 to 9.1.0.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v9.0.4...v9.1.0)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-version: 9.1.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements-dev.txt

@@ -8,4 +8,4 @@ flake8-requirements==2.3.0
 mypy==1.19.1
 pep257==0.7.0
 pre-commit==4.5.1
-sphinx==9.0.4
+sphinx==9.1.0