Update Quiz

Author: rcosta358

docs/index.html

@@ -120,7 +120,7 @@ <h1>LiquidJava Quiz</h1>
 <p>In LiquidJava, the <code>@ExternalRefinementsFor</code> annotation is used to:</p>
 <ul class="radio-list">
 <li><label><input type="radio" data-question="1" data-content="0" /> Import refinements from external libraries</label></li>
-<li><label><input type="radio" data-question="0" data-content="1" /> Define new refinements for an external class</label></li>
+<li><label><input type="radio" data-question="0" data-content="1" /> Define new refinements for an external class or interface</label></li>
 <li><label><input type="radio" data-question="1" data-content="0" /> Export refinements to other modules</label></li>
 <li><label><input type="radio" data-question="1" data-content="0" /> None of the above</label></li>
 </ul>