docs(scroll-nav): add HTML support

Author: dolymood

document/components/docs/en-US/scroll-nav.md

@@ -152,7 +152,7 @@ ScrollNav component. You can use it to sticky your navigation bar and content.
 | Attribute | Description | Type | Accepted Values | Default |
 | - | - | - | - | - |
 | label | required, the key of panel | String/Number | - | - |
-| title | the title of panel | String/Number | - | default equal to `label` Prop |
+| title | the title of panel, can be a HTML string value | String/Number | - | default equal to `label` Prop |
 
 ### Slot
 

document/components/docs/zh-CN/scroll-nav.md

@@ -152,7 +152,7 @@
 | 参数 | 说明 | 类型 | 可选值 | 默认值 |
 | - | - | - | - | - |
 | label | 必须，面板的唯一标示的值 | String/Number | - | - |
-| title | 面板标题内容 | String/Number | - | 默认等于 label |
+| title | 面板标题内容，可以是 HTML 字符串 | String/Number | - | 默认等于 label |
 
 ### 插槽