Bump sphinx-rtd-theme from 2.0.0 to 3.0.1

Bumps [sphinx-rtd-theme](https://github.com/readthedocs/sphinx_rtd_theme) from 2.0.0 to 3.0.1.
- [Changelog](https://github.com/readthedocs/sphinx_rtd_theme/blob/master/docs/changelog.rst)
- [Commits](readthedocs/sphinx_rtd_theme@2.0.0...3.0.1)

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

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

Author: dependabot[bot]

poetry.lock

@@ -77,7 +77,7 @@ pydocstyle = "^6.1.1"
 sphinx = "^7.0.0"
 sphinx-design = "^0.6.0"
 sphinx-external-toc = "^1.0.0"
-sphinx-rtd-theme = "^2.0.0"
+sphinx-rtd-theme = ">=2,<4"
 sphinxcontrib-bibtex = "^2.6.1"
 sphinxcontrib-mermaid = "^0.9.2"