Bump sphinx-rtd-theme from 1.3.0 to 2.0.0 in /server

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]>

server/pyproject.toml

@@ -35,7 +35,7 @@ certgrinderd = "certgrinderd.certgrinderd:main"
 [project.optional-dependencies]
 dev = ["twine == 4.0.2", "pre-commit == 3.5.0", "setuptools-scm == 8.0.4", "build==1.0.3"]
 test = ["pytest == 7.4.3", "pytest-cov==4.1.0", "tox == 4.11.3"]
-docs = ["Sphinx==7.2.6", "sphinx-rtd-theme==1.3.0", "sphinx-argparse==0.4.0"]
+docs = ["Sphinx==7.2.6", "sphinx-rtd-theme==2.0.0", "sphinx-argparse==0.4.0"]
 
 [project.urls]
 homepage = "https://github.com/tykling/certgrinder"