[Suggestion]: Improve key attribute explanation

Summary

The current docs for the key attribute do not explain in what scenario React actually relies on it

as far as I can tell, this attribute is only relevant for stateful components that rely on their useCallback destructors to be called when the corresponding entry is removed from a list.

Page

https://react.dev/learn/rendering-lists

Details

This comment on reddit may be a good example of a clear explanation of how react actually relies on the key when rendering

https://react.dev/learn/rendering-lists の key 属性のセクションから始め、次に、提案されている説明についてはリンク先の Reddit コメントを読んでください。React がリスト項目をレンダーするときに keys に依存する状況を明確にし、説明が正確で理解しやすくなるようにページを更新してください。