Bump sphinx-autobuild from 2021.3.14 to 2024.2.4 (#1095)

Bumps [sphinx-autobuild](https://github.com/sphinx-doc/sphinx-autobuild) from 2021.3.14 to 2024.2.4.
- [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@2021.03.14...2024.02.04)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

setup.py

@@ -83,7 +83,7 @@
             "mypy==v1.8.0 ; python_version>='3.8'",
             # Docs.
             "Sphinx==7.2.5 ; python_version>='3.9'",
-            "sphinx-autobuild==2021.3.14 ; python_version>='3.9'",
+            "sphinx-autobuild==2024.2.4 ; python_version>='3.9'",
             "sphinx-rtd-theme==2.0.0 ; python_version>='3.9'",
         ]
     },