Bump sphinx-autobuild from 2024.4.16 to 2024.9.19

Bumps [sphinx-autobuild](https://github.com/sphinx-doc/sphinx-autobuild) from 2024.4.16 to 2024.9.19.
- [Release notes](https://github.com/sphinx-doc/sphinx-autobuild/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx-autobuild/blob/main/NEWS.rst)
- [Commits](sphinx-doc/sphinx-autobuild@2024.04.16...2024.09.19)

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

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

pyproject.toml

@@ -67,7 +67,7 @@ dev = [
  "mypy==v1.11.2 ; python_version>='3.8'",
  # Docs.
  "Sphinx==7.3.7 ; python_version>='3.9'",
- "sphinx-autobuild==2024.4.16 ; python_version>='3.9'",
+ "sphinx-autobuild==2024.9.19 ; python_version>='3.9'",
  "sphinx-rtd-theme==2.0.0 ; python_version>='3.9'"
 ]