Updated `brew livecheck` doc
Updated `brew livecheck` doc

MikeMcQuaid/brew,nandub/brew,nandub/brew,Homebrew/brew,MikeMcQuaid/brew,Homebrew/brew,nandub/brew,MikeMcQuaid/brew,MikeMcQuaid/brew,Homebrew/brew,nandub/brew,Homebrew/brew