Update example-widget.html

Added comment for instantiating arvia chat widget

Author: BurhanBozkurt

example-widget.html

@@ -18,6 +18,7 @@ <h1 class="p-3">Arvia Chat Web SDK Example - Floating Chat Widget</h1>
 
     <script type="text/javascript">
 
+        // Instantiate arvia chat widget with your project id
         var arviaChatWidget = new ArviaChatWidget('5b4f145ac4dbc95dcf926a52');
         arviaChatWidget.setTestUser(true);
         arviaChatWidget.init();