fix instlal link

docs/source/interactive/tutorial.rst

@@ -10,7 +10,7 b' more than the standard prompt. Some key features are described here. For more'
 information, check the :ref:`tips page <tips>`, or look at examples in the
 `IPython cookbook <https://github.com/ipython/ipython/wiki/Cookbook%3A-Index>`_.
 
-If you haven't done that yet see `how to install ipython <https://ipython.readthedocs.io/en/stable/install/index.html>`_ .
+If you haven't done that yet see :ref:`how to install ipython <install>`.
 
 If you've never used Python before, you might want to look at `the official
 tutorial <http://docs.python.org/tutorial/>`_ or an alternative, `Dive into