Fix link to Pythran manual in the documentation.

docs/src/userguide/numpy_pythran.rst

@@ -48,7 +48,7 @@ Then, with the following header in ``hello_pythran.pyx``:
 Please note that Pythran can further be tweaked by adding settings in the
 ``$HOME/.pythranrc`` file. For instance, this can be used to enable `Boost.SIMD`_ support.
 See the `Pythran user manual
-<https://pythonhosted.org/pythran/MANUAL.html#customizing-your-pythranrc>`_ for
+<https://pythran.readthedocs.io/en/latest/MANUAL.html#customizing-your-pythranrc>`_ for
 more information.
 
 .. _Pythran: https://github.com/serge-sans-paille/pythran