Update sphinx requirement from <7.3.8 to <7.4.5

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@v3.5.0...v7.4.4)

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

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

setup.cfg

@@ -53,7 +53,7 @@ docs =
 	# upstream
 	sphinx >= 3.5
 	# workaround for sphinx/sphinx-doc#11662
-	sphinx < 7.3.8
+	sphinx < 7.4.5
 	jaraco.packaging >= 9.3
 	rst.linker >= 1.9
 	furo