Remove bitcoin link in Readme.md since the link is broken (#13935)
Remove bitcoin link in Readme.md since the link is broken (#13935)


subesokun/Rocket.Chat,VoiSmart/Rocket.Chat,inoio/Rocket.Chat,VoiSmart/Rocket.Chat,4thParty/Rocket.Chat,4thParty/Rocket.Chat,Sing-Li/Rocket.Chat,subesokun/Rocket.Chat,subesokun/Rocket.Chat,4thParty/Rocket.Chat,Sing-Li/Rocket.Chat,subesokun/Rocket.Chat,inoio/Rocket.Chat,4thParty/Rocket.Chat,Sing-Li/Rocket.Chat,inoio/Rocket.Chat,VoiSmart/Rocket.Chat,Sing-Li/Rocket.Chat