fix app header story

Author: julczka

stories/scaffolding/app-header/app-header.story.ts

@@ -1,6 +1,13 @@
-import { Story } from '@storybook/web-components';
+import { StoryFn } from '@storybook/web-components';
 import { html } from 'lit';
 
+import '@umbraco-ui/uui-tabs/lib';
+import '@umbraco-ui/uui-icon-registry-essential/lib';
+import '@umbraco-ui/uui-popover/lib';
+import '@umbraco-ui/uui-symbol-more/lib';
+import '@umbraco-ui/uui-menu-item/lib';
+import '@umbraco-ui/uui-avatar/lib';
+
 import './app-header.example.ts';
 
 export default {
@@ -9,6 +16,6 @@ export default {
   component: 'uui-app-header-example',
 };
 
-export const AppHeader: Story = () => html`
+export const AppHeader: StoryFn = () => html`
   <uui-app-header-example></uui-app-header-example>
 `;