fix(deps): bump sphinx-rtd-theme from 1.3.0 to 2.0.0

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]>

Author: dependabot[bot]

requirements-docs.txt

@@ -2,4 +2,4 @@ matplotlib==3.8.0
 numpydoc==1.6.0
 sphinx==7.2.5
 sphinx-gallery==0.14.0
-sphinx-rtd-theme==1.3.0
+sphinx-rtd-theme==2.0.0