small update in the README
small update in the README

skynet/dns,michaelharo/dns,tempbottle/dns,ym/go-dns,josephyzhou/dns,skyportsystems/dns,bboreham/dns,AlexCheong/dns,miekg/dns,hugozhu/dns,flebarbe/dns,jdef/dns,modulexcite/dns,Git-Host/dns,cloudflare/dns,Psiphon-Inc/dns,tsenart/dns,rolandshoemaker/dns,ezoic/dns,curtiszimmerman/dns,janstk/dns,ErikDubbelboer/dns,letsencrypt/dns,bragr/dns,jmhodges/dns,asergeyev/dns,benbearchen/dns