Bump sphinx-rtd-theme from 0.5.2 to 1.0.0 in /docs (#984)

Bumps [sphinx-rtd-theme](https://github.com/readthedocs/sphinx_rtd_theme) from 0.5.2 to 1.0.0.
- [Release notes](https://github.com/readthedocs/sphinx_rtd_theme/releases)
- [Changelog](https://github.com/readthedocs/sphinx_rtd_theme/blob/master/docs/changelog.rst)
- [Commits](https://github.com/readthedocs/sphinx_rtd_theme/compare/0.5.2...1.0.0)

---
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>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/requirements.txt

@@ -3,7 +3,7 @@ docutils==0.16
 Pygments==2.10.0
 myst-parser==0.15.2
 Sphinx==4.1.2
-sphinx-rtd-theme==0.5.2
+sphinx-rtd-theme==1.0.0
 sphinxcontrib-websupport==1.2.4
 sphinxcontrib-images==0.9.4
 tomli==1.2.1