docs: update List grid column optional values, close #12901

components/list/index.en-US.md

@@ -42,7 +42,7 @@ More about pagination, please check [`Pagination`](/components/pagination/).
 
 | Property | Description | Type | Default |
 | -------- | ----------- | ---- | ------- |
-| column | column of grid | number | - |
+| column | column of grid, [optional number](https://github.com/ant-design/ant-design/blob/a7f17b4cdebbca07b3b9ce5698de61e772d46237/components/list/index.tsx#L16) | number | - |
 | gutter | spacing between grid | number | 0 |
 | size | Size of list | `default` \| `middle` \| `small` | `default` |
 | xs | `<576px` column of grid | number | - |

components/list/index.zh-CN.md

@@ -44,7 +44,7 @@ cols: 1
 
 | 参数 | 说明 | 类型 | 默认值 |
 | --- | --- | --- | --- |
-| column | 列数 | number | - |
+| column | 列数，[可选值](https://github.com/ant-design/ant-design/blob/a7f17b4cdebbca07b3b9ce5698de61e772d46237/components/list/index.tsx#L16) | number | - |
 | gutter | 栅格间隔 | number | 0 |
 | xs | `<576px` 展示的列数 | number | - |
 | sm | `≥576px` 展示的列数 | number | - |