Update ProTip on Installation page in docs to point to all the info about Pygments and the 'highlight' tag. Fixes #1196.

site/docs/installation.md

@@ -58,7 +58,8 @@ Check out [the extras page](../extras) for more information.
   <p>
     If you’re the kind of person who is using Jekyll, then chances are you’ll
     want to enable syntax highlighting using Pygments. You should really
-    <a href="../extras">check out how to do that</a> before you go any further.
+    <a href="../templates/#code_snippet_highlighting">check out how to do
+    that</a> before you go any further.
   </p>
 </div>