fix path; thanks to pat hall (amundo)

Author: Rebecca Murphey

demos/custom-events/custom-events.html

@@ -26,7 +26,7 @@ <h2>Search Results for <span class="search_term"></span></h2>
 		</div> 
 	</div> 
 
-	<script src="../exercises/libs/jquery-1.4.2.min.js"></script> 
+	<script src="../../exercises/libs/jquery-1.4.2.min.js"></script> 
 	<script src="js/custom-events.js"></script>
 </body> 
 </html>