Fix displaying of the HTML notification

Signed-off-by: Joas Schilling <coding@schilljs.com>

apps/updatenotification/js/notification.js

@@ -17,10 +17,5 @@ $(document).ready(function(){
 	var text = t('core', '{version} is available. Get more information on how to update.', {version: oc_updateState.updateVersion}),
 		element = $('<a>').attr('href', oc_updateState.updateLink).attr('target','_blank').text(text);
 
-	OC.Notification.show(element, 
-		{
-			isHTML: true,
-			type: 'error'
-		}
-	);
+	OC.Notification.showHtml(element, { type: 'error' });
 });