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!

Bắt đầu từ Advanced Guide trên reactjs.org và tìm mục điều hướng hoặc mục mã nguồn xác định thứ tự các phần. So sánh “Forwarding Refs” với “Refs and the DOM”, sau đó xác nhận rằng “Refs and the DOM” xuất hiện trước và guide vẫn được render chính xác.