Bump sphinx from 7.2.6 to 7.4.0 (#919)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 7.2.6 to 7.4.0.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v7.2.6...v7.4.0)

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

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

pyproject.toml

@@ -66,7 +66,7 @@ docs = [
     "myst_parser==2.0.0",
     "numpydoc==1.7.0",
     "sphinx-copybutton==0.5.2",
-    "sphinx==7.2.6",
+    "sphinx==7.4.0",
     "sphinx_design==0.6.0",
 ]
 dev = ["pre-commit>=2.12.1"]