n-tree-select parent items in tree are selectable when check-strategy=child and cascade=false

[Dukestep]

TuSimple/naive-ui version (版本)

2.28.0

Vue version (Vue 版本)

3.2.32

Browser and its version (浏览器及其版本)

Chrome

System and its version (系统及其版本)

MacOS(11.2.3)

Node version (Node 版本)

Reappearance link (重现链接)

https://codesandbox.io/s/weathered-leftpad-l5c688?file=/src/Demo.vue

Reappearance steps (重现步骤)

Click on tree-select component and select a parent, it should not be selectable.

Expected results (期望的结果)

Items in the tree with a checkbox should be selectable, items without should not be selectable.

Actual results (实际的结果)

Items without a checkbox are selectable in the tree.

Remarks (补充说明)