build(deps): bump sphinx-rtd-theme from 1.3.0 to 2.0.0 (#989)

Bumps [sphinx-rtd-theme](https://github.com/readthedocs/sphinx_rtd_theme) from 1.3.0 to 2.0.0.
- [Changelog](https://github.com/readthedocs/sphinx_rtd_theme/blob/master/docs/changelog.rst)
- [Commits](readthedocs/sphinx_rtd_theme@1.3.0...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]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

docs/requirements.txt

@@ -2,4 +2,4 @@ myst-parser==2.0.0
 docutils==0.20.1
 Jinja2==3.1.2
 sphinx==6.2.1
-sphinx_rtd_theme==1.3.0
+sphinx_rtd_theme==2.0.0