Bump the actions group with 2 updates

Updates the requirements on [sphinx](https://github.com/sphinx-doc/sphinx) and [sphinx-autoapi](https://github.com/readthedocs/sphinx-autoapi) to permit the latest version.

Updates `sphinx` to 8.0.2
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/v8.0.2/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v0.1.61611...v8.0.2)

Updates `sphinx-autoapi` to 3.3.1
- [Release notes](https://github.com/readthedocs/sphinx-autoapi/releases)
- [Changelog](https://github.com/readthedocs/sphinx-autoapi/blob/main/CHANGELOG.rst)
- [Commits](readthedocs/sphinx-autoapi@v0.2.0...v3.3.1)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:production
  dependency-group: actions
- dependency-name: sphinx-autoapi
  dependency-type: direct:production
  dependency-group: actions
...

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

pyproject.toml

@@ -78,9 +78,9 @@ gpu = [
  "cupy-cuda12x",
 ]
 docs = [
- 'sphinx==7.4.7',
+ 'sphinx==8.0.2',
  'sphinx-autobuild>=2021.3.14',
- 'sphinx-autoapi==3.1.0',
+ 'sphinx-autoapi==3.3.1',
  'sphinx_design',
  'sphinx-issues',
  'sphinx-copybutton',