fix ul on doc page

git-svn-id: https://svn.xiph.org/websites/theora.org@16686 0101bb08-14d6-0310-b084-bc0e0c8e3800

doc/index.shtml.en

@@ -15,7 +15,7 @@
   <li><a href="/faq/">Frequently Asked Questions</a></li>
 </ul>
 
-<li>
+<ul>
   <li><a href="/doc/Theora.pdf">Theora Format Specification</a></li>
   <li><a href="/doc/libtheora-1.1/">libtheora 1.1 API references</a></li>
   <li><a href="/doc/libtheora-1.0/">libtheora 1.0 API references</a></li>