Bump sphinx from 7.3.7 to 9.0.4

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 7.3.7 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@v7.3.7...v9.0.4)

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

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

Author: dependabot[bot]

requirements_doc.txt

@@ -1,4 +1,4 @@
-Sphinx==7.3.7
+Sphinx==9.0.4
 sphinx-rtd-theme==2.0.0
 autodoc_pydantic==2.2.0
 numpy==2.3.4