Add v12.x to the list of releases. (#2968)
Add v12.x to the list of releases. (#2968)

Co-authored-by: Rich Trott <28a7b6144c43947e3f532c033ff42c8a2ae08045@gmail.com>
Co-authored-by: XhmikosR <b60f67e10123951b393d9ba15dcf79efc14744bb@gmail.com>

nodejs/new.nodejs.org,nodejs/new.nodejs.org