Fix broken link

docs/src/userguide/numpy_pythran.rst

@@ -20,7 +20,7 @@ Usage example with distutils
 ----------------------------
 
 You first need to install Pythran. See its `documentation
-<https://pythonhosted.org/pythran/MANUAL.html>`_ for more information.
+<http://pythran.readthedocs.io/en/latest/>`_ for more information.
 
 Then, simply add a ``cython: np_pythran=True`` directive at the top of the
 Python files that needs to be compiled using Pythran numpy support.