docs: Update TreeNode isLeaf desc (#26872)

components/tree/index.en-US.md

@@ -64,7 +64,7 @@ Almost anything can be represented in a tree structure. Examples include directo
 | disableCheckbox | Disables the checkbox of the treeNode | boolean | false |  |
 | disabled | Disables the treeNode | boolean | false |  |
 | icon | Customize icon. When you pass component, whose render will receive full TreeNode props as component props | ReactNode \| (props) => ReactNode | - |  |
-| isLeaf | Determines if this is a leaf node(effective when `loadData` is specified) | boolean | false |  |
+| isLeaf | Determines if this is a leaf node(effective when `loadData` is specified). `false` will force trade TreeNode as a parent node | boolean | - |  |
 | key | Used with (default)ExpandedKeys / (default)CheckedKeys / (default)SelectedKeys. P.S.: It must be unique in all of treeNodes of the tree | string | (internal calculated position of treeNode) |  |
 | selectable | Set whether the treeNode can be selected | boolean | true |  |
 | title | Title | string \| ReactNode | `---` |  |

components/tree/index.zh-CN.md

@@ -65,7 +65,7 @@ cover: https://gw.alipayobjects.com/zos/alicdn/Xh-oWqg9k/Tree.svg
 | disableCheckbox | 禁掉 checkbox | boolean | false |
 | disabled | 禁掉响应 | boolean | false |
 | icon | 自定义图标。可接收组件，props 为当前节点 props | ReactNode \| (props) => ReactNode | - |  |
-| isLeaf | 设置为叶子节点(设置了`loadData`时有效) | boolean | false |
+| isLeaf | 设置为叶子节点(设置了`loadData`时有效)。为 `false` 时会强制将其作为父节点 | boolean | - |
 | key | 被树的 (default)ExpandedKeys / (default)CheckedKeys / (default)SelectedKeys 属性所用。注意：整个树范围内的所有节点的 key 值不能重复！ | string | (内部计算出的节点位置) |
 | selectable | 设置节点是否可被选中 | boolean | true |
 | title | 标题 | string \| ReactNode | `---` |