message: [Doc] Tabbar: fix typo
diff: @@ -15,7 +15,7 @@ Vue.use(Tabbar).use(TabbarItem);
  <van-tabbar v-model="active">
  <van-tabbar-item icon="home-o">Tab</van-tabbar-item>
  <van-tabbar-item icon="search" dot>Tab</van-tabbar-item>
  - <van-tabbar-item icon="freinds-o" info="5">Tab</van-tabbar-item>
  + <van-tabbar-item icon="friends-o" info="5">Tab</van-tabbar-item>
  <van-tabbar-item icon="setting-o" info="20">Tab</van-tabbar-item>
  </van-tabbar>
  ```
  