Update tree select documentation

According to https://github.com/react-component/tree-select documentation

components/tree-select/index.en-US.md

@@ -42,7 +42,7 @@ Any data whose entries are defined in a hierarchical manner is fit to use this c
 | treeCheckable | Whether to show checkbox on the treeNodes | boolean | false |
 | treeCheckStrictly | Whether to check nodes precisely (in the `checkable` mode), means parent and child nodes are not associated, and it will make `labelInValue` be true | boolean | false |
 | treeData | Data of the treeNodes, manual construction work is no longer needed if this property has been set(ensure the Uniqueness of each value) | array\<{ value, title, children, \[disabled, disableCheckbox, selectable] }> | \[] |
-| treeDataSimpleMode | Enable simple mode of treeData. Changes the `treeData` schema to: \[{id:1, pId:0, value:'1', title:"test1",...},...] where pId is parent node's id). It is possible to replace the default `id` and `pId` keys by providing object to `treeDataSimpleMode` | false\|Array\<{ id: string, pId: string, rootPId: null }> | false |
+| treeDataSimpleMode | Enable simple mode of treeData. Changes the `treeData` schema to: \[{id:1, pId:0, value:'1', title:"test1",...},...] where pId is parent node's id). It is possible to replace the default `id` and `pId` keys by providing object to `treeDataSimpleMode` | false\|object\<{ id: string, pId: string, rootPId: null }> | false |
 | treeDefaultExpandAll | Whether to expand all treeNodes by default | boolean | false |
 | treeDefaultExpandedKeys | Default expanded treeNodes | string\[] | - |
 | treeExpandedKeys | Set expanded keys | string\[] | - |