Bump sphinx-rtd-theme from 3.0.0rc3 to 3.0.0rc4 (#11688)

Bumps [sphinx-rtd-theme](https://github.com/readthedocs/sphinx_rtd_theme) from 3.0.0rc3 to 3.0.0rc4.
- [Changelog](https://github.com/readthedocs/sphinx_rtd_theme/blob/master/docs/changelog.rst)
- [Commits](readthedocs/sphinx_rtd_theme@3.0.0rc3...3.0.0rc4)

---
updated-dependencies:
- dependency-name: sphinx-rtd-theme
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

ci-constraints-requirements.txt

@@ -210,7 +210,7 @@ sphinx==8.0.2 ; python_full_version >= '3.10'
     #   sphinx-rtd-theme
     #   sphinxcontrib-jquery
     #   sphinxcontrib-spelling
-sphinx-rtd-theme==3.0.0rc3 ; python_full_version >= '3.8'
+sphinx-rtd-theme==3.0.0rc4 ; python_full_version >= '3.8'
     # via cryptography (pyproject.toml)
 sphinxcontrib-applehelp==1.0.2 ; python_full_version < '3.8'
     # via sphinx