Fix syntax error.

ISHelp/isetup.xml

@@ -3663,7 +3663,7 @@ Keep the default set of selected tasks, but deselect the "desktopicon" task:<br/
 
 <li>Cristoph Nahr: Code for the .NET version detection (6.0.4).</li>
 
-<li>leserg73: Code for the Compiler IDE's MessageBox Designer (6.1.0).<li>
+<li>leserg73: Code for the Compiler IDE's MessageBox Designer (6.1.0).</li>
 
 </ul>