fix index sidebar

Author: jdh2358

doc/_templates/indexsidebar.html

@@ -41,7 +41,7 @@ <h3>Videos</h3>
 <h3>Toolkits</h3>
 
 <p>There are several matplotlib add-on <a href="{{
-pathto('users/toolkits') }}">toolkits</a>, including the projection
+pathto('mpl_toolkits/index') }}">toolkits</a>, including the projection
 and mapping toolkit
 <a href="http://matplotlib.github.com/basemap">basemap</a>, 3d plotting with <a href="{{
 pathto('mpl_toolkits/mplot3d/index') }}">mplot3d</a>, axes and axis helpers in <a href="{{