Make index links go straight to the .html

Since doc.perl6.org server expects them to be in /index.html otherwise

Author: Mouq

lib/HomePage.pod

@@ -9,22 +9,22 @@ by reporting mistakes or sending patches.
 
 <hr>
 
-<h3><a href="/language">Language Reference & Tutorials</a></h3>
+<h3><a href="/language.html">Language Reference & Tutorials</a></h3>
 <desc>
     A collection of documents describing, in detail, the various
     conceptual parts of the language.Z<< If you're new to Perl 6,
     language>intro is a good place to start.>>
 </desc>
-<h3><a href="/type">Type Reference</a></h3>
+<h3><a href="/type.html">Type Reference</a></h3>
 <desc>
     Index of built-in classes and roles.
 </desc>
-<h3><a href="/routine">Routine Reference</a></h3>
+<h3><a href="/routine.html">Routine Reference</a></h3>
 <desc>
     Index of built-in subroutines and methods.
 </desc>
 Z<<
-<h3><a href="/module">Module Reference</a></h3>
+<h3><a href="/module.html">Module Reference</a></h3>
 <desc>
     Index of modules that are part of the official core distribution.
 </desc>