Bump sphinx-rtd-theme from 2.0.0 to 3.0.0

Bumps [sphinx-rtd-theme](https://github.com/readthedocs/sphinx_rtd_theme) from 2.0.0 to 3.0.0.
- [Changelog](https://github.com/readthedocs/sphinx_rtd_theme/blob/master/docs/changelog.rst)
- [Commits](readthedocs/sphinx_rtd_theme@2.0.0...3.0.0)

---
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>

requirements/checkdocs.txt

@@ -77,7 +77,7 @@ sphinx==7.4.7
  # sphinxcontrib-serializinghtml
 sphinx-autobuild==2024.9.3
  # via -r requirements/checkdocs.in
-sphinx-rtd-theme==2.0.0
+sphinx-rtd-theme==3.0.0
  # via -r requirements/checkdocs.in
 sphinxcontrib-applehelp==1.0.7
  # via sphinx

requirements/docs.txt

@@ -77,7 +77,7 @@ sphinx==7.4.7
  # sphinxcontrib-serializinghtml
 sphinx-autobuild==2024.9.3
  # via -r requirements/docs.in
-sphinx-rtd-theme==2.0.0
+sphinx-rtd-theme==3.0.0
  # via -r requirements/docs.in
 sphinxcontrib-applehelp==1.0.7
  # via sphinx