update readme
update readme

mauricio/coreutils,dennis/coreutils,kwantam/coreutils,dbrgn/coreutils,Gianbaoluo/coreutils,Shir0kamii/coreutils,tempbottle/coreutils,uutils/coreutils,beni55/coreutils,retep998/coreutils,efuquen/coreutils,dennis/coreutils,keunwoo/coreutils,kball/coreutils,silvio/rust-coreutils,sshling/coreutils,steveklabnik/coreutils,efuquen/coreutils,steveklabnik/coreutils,tempbottle/coreutils,polapl/coreutils,filmor/coreutils,ebfe/coreutils,kwantam/coreutils,wimh/coreutils,keunwoo/coreutils,Arcterus/coreutils,samfoo/coreutils,beni55/coreutils,kevgeniy/coreutils,bundai223/coreutils,filmor/coreutils,retep998/coreutils,Heather/coreutils,uutils/coreutils,Shir0kamii/coreutils,dokaptur/coreutils,hexsel/coreutils,Shtong/coreutils,mauricio/coreutils,polapl/coreutils,jbcrail/coreutils,dbrgn/coreutils,uutils/coreutils,silvio/rust-coreutils,bundai223/coreutils,samfoo/coreutils,jbcrail/coreutils,dbrgn/coreutils,Gianbaoluo/coreutils,sshling/coreutils,ebfe/coreutils,Arcterus/coreutils,Heather/coreutils,kball/coreutils,wimh/coreutils,kevgeniy/coreutils,Shtong/coreutils,hexsel/coreutils