Update sphinx requirement from ~=7.3.7 to ~=7.4.3

Updates the requirements on [sphinx](https://github.com/sphinx-doc/sphinx) to permit the latest version.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v7.3.7...v7.4.3)

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

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

pyproject.toml

@@ -63,7 +63,7 @@ docs = [
     'sphinx-copybutton~=0.5.2',
     'sphinx-markdown-tables~=0.0.17',
     'sphinx-rtd-theme~=2.0.0',
-    'sphinx~=7.3.7',
+    'sphinx~=7.4.3',
 ]
 lint = [
     'pylint~=3.0',