[Typo]: Code example mistake in useMemo page

Summary

There is a mistake in the ChatRoom example code on the useMemo page, specifically in the 'Preventing an Effect from firing too often' section.

Page

https://react.dev/reference/react/useMemo#preventing-an-effect-from-firing-too-often

Details

There are two mistakes in the ChatRoom example under the 'Preventing an Effect from firing too often' section:

1. The line const options = createOptions() suddenly appears in the code without context. It seems like this should be removed.
2. In the comment 'Only changes when createOptions changes', the reference to 'createOptions' should be replaced with 'options object'. This is because options is the actual dependency in the useEffect.

Screenshot of typo:

打开 React useMemo 参考页面中的“Preventing an Effect from firing too often”部分，并检查 ChatRoom 示例。确认多余的 createOptions 行和依赖项注释，然后验证该示例是自包含的，并且措辞准确描述了 options 对象。