Bump sphinx from 7.2.6 to 9.0.4

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 7.2.6 to 9.0.4.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/v9.0.4/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v7.2.6...v9.0.4)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-version: 9.0.4
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pyproject.toml

@@ -37,7 +37,7 @@ dev = [
 docs = [
     "fsspec >= 2023.10.0",
     "numpydoc == 1.7.0",
-    "sphinx == 7.2.6",
+    "sphinx==9.0.4",
 ]
 
 [tool.ruff]