For Modal widget, Add __('<your_string>') method (#5646)

For Modal widget, Add __('<your_string>') method in Example because this method is used for translation of the string into another Languages.

Author: magehardik

guides/v2.2/javascript-dev-guide/widgets/widget_modal.md

@@ -80,7 +80,7 @@ buttons: [{
 
 ```javascript
 buttons: [{
-    text: 'Ok',
+    text: $.mage.__('Ok'),
     class: '',
     click: function() {
         this.closeModal();
@@ -259,7 +259,7 @@ The following example shows how to initialize the modal widget and pass options
             'trigger': '[data-trigger=trigger]',
             'responsive': true,
             'buttons': [{
-                text: 'Submit',
+                text: $.mage.__('Submit'),
                 class: 'action'
             }]
         }}">