Fix projects page cross-reference

Author: ncoghlan

source/support.rst

@@ -6,7 +6,7 @@ How to Get Support
 :Last Reviewed: 2015-09-08
 
 For support related to a specific project, see the links on the :doc:`Projects
-<projects>` page.
+<key_projects>` page.
 
 For something more general, or when you're just not sure, use the `distutils-sig
 <http://mail.python.org/mailman/listinfo/distutils-sig>`_ list.