chore: bump sphinx-rtd-theme from 3.0.0 to 3.1.0

Bumps [sphinx-rtd-theme](https://github.com/readthedocs/sphinx_rtd_theme) from 3.0.0 to 3.1.0.
- [Changelog](https://github.com/readthedocs/sphinx_rtd_theme/blob/master/docs/changelog.rst)
- [Commits](readthedocs/sphinx_rtd_theme@3.0.0...3.1.0)

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

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

Author: dependabot[bot]

poetry.lock

@@ -55,7 +55,7 @@ pytest-xdist = "^3.8.0"
 python-semantic-release = "^10.5.2"
 ruff = "^0.14.0"
 safety = "^3"
-sphinx-rtd-theme = "^3.0.0"
+sphinx-rtd-theme = "^3.1.0"
 twine = "^6.2.0"
 xdoctest = "^1.3.0"