Bump sphinx-autobuild from 2021.3.14 to 2024.2.4 (#2527)

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:production
  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>

docs/requirements.txt

@@ -47,7 +47,7 @@ sphinx==7.2.6
     #   -r docs/requirements.in
     #   sphinx-autobuild
     #   sphinxcontrib-plantuml
-sphinx-autobuild==2021.3.14
+sphinx-autobuild==2024.2.4
     # via -r docs/requirements.in
 sphinxcontrib-applehelp==1.0.8
     # via sphinx