Bump sphinx-rtd-theme from 2.0.0 to 3.0.0

Bumps [sphinx-rtd-theme](https://github.com/readthedocs/sphinx_rtd_theme) from 2.0.0 to 3.0.0.
- [Changelog](https://github.com/readthedocs/sphinx_rtd_theme/blob/master/docs/changelog.rst)
- [Commits](readthedocs/sphinx_rtd_theme@2.0.0...3.0.0)

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

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

pyproject.toml

@@ -49,7 +49,7 @@ docs = [
   "pyyaml==6.0.2",
   "sphinx==8.0.2",
   "sphinx-issues==4.1.0",
-  "sphinx-rtd-theme==2.0.0",
+  "sphinx-rtd-theme==3.0.0",
 ]
 tests = ["apispec[yaml,marshmallow]", "openapi-spec-validator==0.7.1", "pytest"]
 dev = ["apispec[tests]", "tox", "pre-commit>=3.5,<5.0"]