chore(deps): Bump sphinx-rtd-theme from 3.0.2 to 3.1.0

Bumps [sphinx-rtd-theme](https://github.com/readthedocs/sphinx_rtd_theme) from 3.0.2 to 3.1.0.
- [Changelog](https://github.com/readthedocs/sphinx_rtd_theme/blob/master/docs/changelog.rst)
- [Commits](https://github.com/readthedocs/sphinx_rtd_theme/compare/3.0.2...3.1.0)

---
updated-dependencies:
- dependency-name: sphinx-rtd-theme
  dependency-version: 3.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -19,7 +19,7 @@ smartypants==2.0.2
 snowballstemmer==3.0.1
 Sphinx==8.1.3
 sphinx-copybutton==0.5.2
-sphinx-rtd-theme==3.0.2
+sphinx-rtd-theme==3.1.0
 sphinx-rtd-dark-mode==1.3.0
 sphinxcontrib-applehelp==2.0.0
 sphinxcontrib-devhelp==2.0.0