Fix tests

Author: dk981234

examples/knockout/index.html

@@ -24,7 +24,7 @@
         <link rel="stylesheet" href="https://unpkg.com/jquery-ui-dist/jquery-ui.css" />
             <!-- jquery-ui-datepicker -->
 
-        <script src="https://unpkg.com/survey-knockout/survey.ko.min.js"></script>
+        <script src="https://unpkg.com/survey-knockout@legacy/survey.ko.min.js"></script>
         <link rel="stylesheet" href="https://unpkg.com/survey-knockout/defaultV2.min.css" />
         <script src="https://unpkg.com/survey-creator/survey-creator.min.js"></script>
         <link href="https://unpkg.com/survey-creator/survey-creator.min.css" type="text/css" rel="stylesheet"/>