Reorganizing the advanced guide

Hi everybody!

I noticed one thing here in the https://reactjs.org/ and wanted to share with you. In the "Advanced Guide" part of the documentation "Forwarding Refs" section comes BEFORE "Refs and the DOM" section. However, the docs explain what refs are, how to use them and why would someone want to forward refs in the "Refs and the DOM" section. I know that currently the advanced part of the docs is in the alphabetical order. However, I thought that bringing an attention to the issue and reordering the docs would help the community. Cheers!

reactjs.org の Advanced Guide から始め、セクションの順序を決定するナビゲーションまたはソースのエントリを見つけます。「Forwarding Refs」と「Refs and the DOM」を比較し、その後「Refs and the DOM」が先に表示され、ガイドが引き続き正しくレンダリングされることを確認します。