Bump sphinx from 4.4.0 to 8.1.3

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 4.4.0 to 8.1.3.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v4.4.0...v8.1.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

setup.py

@@ -111,7 +111,7 @@ def package_files(prefix: str, directory: str, extension: str):
     'jupyter==1.1.1',
     'yamllint==1.35.1',
     'recommonmark==0.7.1',
-    'sphinx==4.4.0',
+    'sphinx==8.1.3',
     'pre-commit>=3.4.0,<5',
     # embedding md in rst require docutils>=0.17. See
     # https://myst-parser.readthedocs.io/en/latest/sphinx/use.html?highlight=parser#include-markdown-files-into-an-rst-file