message: docs(Sidebar): add doc of disabled prop
diff: @@ -42,6 +42,16 @@ export default {
  </van-sidebar>
  ```
  +### Disabled
  +
  +```html
  +<van-sidebar v-model="activeKey">
  + <van-sidebar-item title="Title" />
  + <van-sidebar-item title="Title" disabled />
  + <van-sidebar-item title="Title" />
  +</van-sidebar>
  +```
  +
  ## API
  ### Sidebar Props
  