docs(layout): update type definition (#5477)

Author: buqiyuan

components/layout/index.en-US.md

@@ -86,15 +86,15 @@ The sidebar.
 
 | Property | Description | Type | Default | Version |
 | --- | --- | --- | --- | --- |
-| breakpoint | [breakpoints](/components/grid#api) of the responsive layout | Enum { 'xs', 'sm', 'md', 'lg', 'xl', 'xxl' } | - |  |
+| breakpoint | [breakpoints](/components/grid#api) of the responsive layout | `xs` \| `sm` \| `md` \| `lg` \| `xl` \| `xxl` | - |  |
 | class | container className | string | - |  |
 | collapsed(v-model) | to set the current status | boolean | - |  |
 | collapsedWidth | width of the collapsed sidebar, by setting to `0` a special trigger will appear | number | 80 |  |
 | collapsible | whether can be collapsed | boolean | false |  |
 | defaultCollapsed | to set the initial status | boolean | false |  |
 | reverseArrow | reverse direction of arrow, for a sider that expands from the right | boolean | false |  |
 | style | to customize the styles | object\|string | - |  |
-| theme | color theme of the sidebar | string: `light` `dark` | `dark` |  |
+| theme | color theme of the sidebar | `light` \| `dark` | `dark` |  |
 | trigger | specify the customized trigger, set to null to hide the trigger | string\|slot | - |  |
 | width | width of the sidebar | number\|string | 200 |  |
 | zeroWidthTriggerStyle | to customize the styles of the special trigger that appears when `collapsedWidth` is 0 | object | - | 1.5.0 |

components/layout/index.zh-CN.md

@@ -87,15 +87,15 @@ cover: https://gw.alipayobjects.com/zos/alicdn/hzEndUVEx/Layout.svg
 
 | 参数 | 说明 | 类型 | 默认值 | 版本 |
 | --- | --- | --- | --- | --- |
-| breakpoint | 触发响应式布局的[断点](/components/grid#API) | Enum { 'xs', 'sm', 'md', 'lg', 'xl', 'xxl' } | - |  |
+| breakpoint | 触发响应式布局的[断点](/components/grid#API) | `xs` \| `sm` \| `md` \| `lg` \| `xl` \| `xxl` | - |  |
 | class | 容器 class | string | - |  |
 | collapsed(v-model) | 当前收起状态 | boolean | - |  |
 | collapsedWidth | 收缩宽度，设置为 0 会出现特殊 trigger | number | 80 |  |
 | collapsible | 是否可收起 | boolean | false |  |
 | defaultCollapsed | 是否默认收起 | boolean | false |  |
 | reverseArrow | 翻转折叠提示箭头的方向，当 Sider 在右边时可以使用 | boolean | false |  |
 | style | 指定样式 | object\|string | - |  |
-| theme | 主题颜色 | string: `light` `dark` | `dark` |  |
+| theme | 主题颜色 | `light` \| `dark` | `dark` |  |
 | trigger | 自定义 trigger，设置为 null 时隐藏 trigger | string\|slot | - |  |
 | width | 宽度 | number\|string | 200 |  |
 | zeroWidthTriggerStyle | 指定当 `collapsedWidth` 为 0 时出现的特殊 trigger 的样式 | object | - | 1.5.0 |