Fixed coding standard issue.

Author: gelanivishal

app/code/Magento/AdminNotification/view/adminhtml/web/js/system/messages/popup.js

@@ -4,9 +4,10 @@
 */
 
 define([
-    "jquery",
-    "Magento_Ui/js/modal/modal"
-], function($){
+    'jquery',
+    'Magento_Ui/js/modal/modal'
+], function ($) {
+    
     'use strict';
 
     return function (data, element) {
@@ -21,4 +22,4 @@ define([
         }
         this.modal.modal('openModal');
     };
-});
+});