Bump sphinx-rtd-theme from 2.0.0 to 3.0.2 in /docs

Bumps [sphinx-rtd-theme](https://github.com/readthedocs/sphinx_rtd_theme) from 2.0.0 to 3.0.2.
- [Changelog](https://github.com/readthedocs/sphinx_rtd_theme/blob/master/docs/changelog.rst)
- [Commits](readthedocs/sphinx_rtd_theme@2.0.0...3.0.2)

---
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>

docs/requirements.txt

@@ -1,6 +1,6 @@
 sphinx==7.4.7
 sphinx-click==6.0.0
-sphinx-rtd-theme==2.0.0
+sphinx-rtd-theme==3.0.2
 click==8.1.7
 tabulate==0.9.0
 dateparser==1.2.0