Update login.stories.js

Author: nmetulev

stories/components/login.stories.js

@@ -36,9 +36,9 @@ export const Templates = () => html`
   </template>
   <template data-type="flyout-commands">
     <div>
-      <button data-props="{@click: handleSignOut}">Sign Out</button>
+      <button data-props="@click: handleSignOut">Sign Out</button>
       <button>Go to my profile</button>
     </div>
   </template>
 </mgt-login>
-`;
+`;