test(Tabs): consistent items with playground

test/components/Tabs.spec.ts

@@ -5,7 +5,9 @@ import ComponentRender from '../component-render'
 describe('Tabs', () => {
   const items = [{
     label: 'Tab1',
-    icon: 'i-heroicons-home',
+    avatar: {
+      src: 'https://avatars.githubusercontent.com/u/739984?v=4'
+    },
     content: 'This is the content shown for Tab1'
   }, {
     label: 'Tab2',