Update sphinx-autobuild requirement from ==2021.3.* to ==2024.10.*

Updates the requirements on [sphinx-autobuild](https://github.com/sphinx-doc/sphinx-autobuild) to permit the latest version.
- [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...2024.10.03)

---
updated-dependencies:
- dependency-name: sphinx-autobuild
  dependency-type: direct:production
...

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

docs/requirements.txt

@@ -1,7 +1,7 @@
 livereload
 pydata-sphinx-theme==0.15.*
 sphinx==5.*
-sphinx-autobuild==2021.3.*
+sphinx-autobuild==2024.10.*
 sphinx_rtd_theme
 sphinx-reredirects==0.1.*
 sphinxcontrib-redoc==1.6.0