test:Update index.ts (#381)

A small change to test workflows.

Author: willum070

samples/address-validation/index.ts

@@ -5,7 +5,7 @@
  */
 
 // [START maps_address_validation]
-// DOM Refs
+// --- DOM Refs
 const addressForm = document.getElementById('address-form');
 const validateButton = document.getElementById('validate-button');
 const clearFormButton = document.getElementById('clear-form-button');