docs(cn): translate new sentence in tutorial (#656)

Co-authored-by: QiChang Li <github@liqichang.com>

content/tutorial/tutorial.md

@@ -1148,7 +1148,7 @@ class Game extends React.Component {
   }
 ```
 
-Notice in `jumpTo` method, we haven't updated `history` property of the state. That is because state updates are merged or in more simple words React will update only the properties mentioned in `setState` method leaving the remaining state as that is. For more info **[see the documentation](/docs/state-and-lifecycle.html#state-updates-are-merged)**.
+在 `jumpTo` 方法中, 我们没有更新 state 中的 `history` 属性。这是因为 state 更新被合并了，或者用更简单的话说，React 不会更新 `setState` 方法中未提到的属性。 **[这篇文档](/docs/state-and-lifecycle.html#state-updates-are-merged)**对此有更详细的介绍。
 
 接下来，我们还要修改 Game 组件的 `handleClick` 方法，当你点击方格的时候触发该方法。