Missing Information about Default Prop Values in React Documentation

In a previous version of the React documentation, there was information about how props default to "true" if no value is passed (https://legacy.reactjs.org/docs/jsx-in-depth.html#props-default-to-true).
However, this information is missing in the current documentation. This can be confusing for developers who are new to React and may not be aware of this behavior. Please add this information back to the documentation to ensure consistency and clarity.

先阅读 https://legacy.reactjs.org/docs/jsx-in-depth.html#props-default-to-true 中的“JSX in Depth”部分，然后在当前的 React 文档中查找对应的 JSX props 指南。当当前文档解释没有显式值的 prop 默认值为 true，并为初学者清晰地说明这一行为时，即表示完成。