modify the document relate to slider

examples/docs/en-US/slider.md

@@ -213,6 +213,7 @@ Selecting a range of values is supported.
 | range | whether to select a range | boolean | — | false |
 | vertical | vertical mode | boolean | — | false |
 | height | Slider height, required in vertical mode | String | — | — |
+|debounce| debounce delay when typing, in millisecond, works when `show-input` is true | number | — | 300 |
 
 ## Events
 | Event Name | Description | Parameters |

examples/docs/zh-CN/slider.md

@@ -237,7 +237,7 @@
 | range | 是否为范围选择 | boolean | — | false |
 | vertical | 是否竖向模式 | boolean | — | false |
 | height | Slider 高度，竖向模式时必填 | String | — | — |
-| debounce | 输入时的去抖延迟，毫秒，show-input等于true时有效 | number | — | 300 |
+| debounce | 输入时的去抖延迟，毫秒，仅在`show-input`等于true时有效 | number | — | 300 |
 
 ### Events
 | 事件名称      | 说明    | 回调参数      |