Update cython requirement from <3.0.0,>=0.29.23 to >=0.29.23,<4.0.0

Updates the requirements on [cython](https://github.com/cython/cython) to permit the latest version.
- [Release notes](https://github.com/cython/cython/releases)
- [Changelog](https://github.com/cython/cython/blob/master/CHANGES.rst)
- [Commits](cython/cython@0.29.23...3.0.11)

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

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

pyproject.toml

@@ -5,6 +5,6 @@ requires = ["setuptools",
             "wheel",
             "extension-helpers",
             "oldest-supported-numpy",
-            "cython>=0.29.23,<3.0.0"]
+            "cython>=0.29.23,<4.0.0"]
 
 build-backend = 'setuptools.build_meta'