Bump sphinx from 7.3.7 to 8.0.0

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 7.3.7 to 8.0.0.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v7.3.7...v8.0.0)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -40,7 +40,7 @@ Tidelift = "https://tidelift.com/subscription/pkg/pypi-marshmallow?utm_source=py
 
 [project.optional-dependencies]
 docs = [
-  "sphinx==7.3.7",
+  "sphinx==8.0.0",
   "sphinx-issues==4.1.0",
   "alabaster==0.7.16",
 ]