From Sergei:

Add a missing html control sequence


git-svn-id: http://root.cern.ch/svn/root/trunk@21422 27541ba8-7e3a-0410-8455-c3a389f83636

thread/doc/index.txt

@@ -6,4 +6,5 @@ BEGIN_HTML
     </a></li>
 <li><a href="http://root.cern.ch/root/HowtoThread.html">How to use the ROOT Thread classes
     </a></li>
+</ul>
 END_HTML