Update index.json

Author: Maxwell175

packages/np311-macos/scipy/index.json

@@ -15,7 +15,7 @@
         "build", 
         "meson-python",
         "pyproject-metadata",
-        "Cython>=3.0.8",
+        "Cython<3.1.0,>=3.0.8",
         "pybind11>=2.13.2",
         "pythran>=0.14.0"
       ],