docs: update tooltip visible(v-model)

Author: tangjinzhou

components/tooltip/index.en-US.md

@@ -20,7 +20,7 @@ The following APIs are shared by Tooltip, Popconfirm, Popover.
 | overlayStyle | Style of the tooltip card | object | - |
 | placement | The position of the tooltip relative to the target, which can be one of `top` `left` `right` `bottom` `topLeft` `topRight` `bottomLeft` `bottomRight` `leftTop` `leftBottom` `rightTop` `rightBottom` | string | `top` |
 | trigger | Tooltip trigger mode | `hover` \| `focus` \| `click` \| `contextmenu` | `hover` |
-| visible | Whether the floating tooltip card is visible or not | boolean | `false` |
+| visible(v-model) | Whether the floating tooltip card is visible or not | boolean | `false` |
 
 ### events
 | Events Name | Description | Arguments |

components/tooltip/index.zh-CN.md

@@ -20,7 +20,7 @@
 | overlayStyle | 卡片样式 | object | 无 |
 | placement | 气泡框位置，可选 `top` `left` `right` `bottom` `topLeft` `topRight` `bottomLeft` `bottomRight` `leftTop` `leftBottom` `rightTop` `rightBottom` | string | top |
 | trigger | 触发行为，可选 `hover/focus/click/contextmenu` | string | hover |
-| visible | 用于手动控制浮层显隐 | boolean | false |
+| visible(v-model) | 用于手动控制浮层显隐 | boolean | false |
 
 ### 事件
 | 事件名称 | 说明 | 回调参数 |