Bump sphinx-rtd-theme from 1.2.2 to 2.0.0

Bumps [sphinx-rtd-theme](https://github.com/readthedocs/sphinx_rtd_theme) from 1.2.2 to 2.0.0.
- [Changelog](https://github.com/readthedocs/sphinx_rtd_theme/blob/master/docs/changelog.rst)
- [Commits](readthedocs/sphinx_rtd_theme@1.2.2...2.0.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pyproject.toml

@@ -53,6 +53,6 @@ pytest-django = "^4.5.2"
 isort = "^5.6.4"
 pytest-cov = "^4.0.0"
 Sphinx = "^5.0.2"
-sphinx-rtd-theme = "^1.0.0"
+sphinx-rtd-theme = "^2.0.0"
 mypy = ">=0.991,<1.5"
 pylint = '^3.0'