Update sphinx requirement from <7.1.0,>=4.3.0 to >=4.3.0,<7.4.0

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@v4.3.0...v7.3.5)

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

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -42,7 +42,7 @@ dev = [
     "build",
     "setuptools",
     "wheel",
-    "Sphinx>=4.3.0,<7.1.0",
+    "Sphinx>=4.3.0,<7.4.0",
     "furo==2023.7.26",
     "myst-parser>=1.0,<2.1",
     "sphinx-copybutton==0.5.2",