update README about Homebrew
update README about Homebrew

BanzaiMan/pyenv,hlecuanda/pyenv,habinmusic/pyenv,recruit-mtl/pyenv,fly19890211/pyenv,sebhahn/pyenv,hlecuanda/pyenv,dnsd/pyenv,fly19890211/pyenv,yyuu/pyenv,genome-vendor/pyenv,obimod/pyenv,genome-vendor/pyenv,takluyver/pyenv,yeonsh/pyenv,cehoffman/pyenv,habinmusic/pyenv,UCASREN/pyenv,sebhahn/pyenv,lozybean/pyenv,obimod/pyenv,pyenv/pyenv,chenfengyuan/pyenv,sebhahn/pyenv,zmwangx/pyenv,pyenv/pyenv,dnsd/pyenv,yyuu/pyenv,syndbg/goenv,dongguangming/pyenv,lepture/pyenv,rowhit/pyenv,zmwangx/pyenv,yeonsh/pyenv,lozybean/pyenv,syndbg/goenv,kevinburke/pyenv,kevinburke/pyenv,dongguangming/pyenv,lepture/pyenv,VShangxiao/pyenv,cehoffman/pyenv,chenfengyuan/pyenv,takluyver/pyenv,syndbg/goenv,blueyed/pyenv,xshwy/pyenv,pyenv/pyenv,BanzaiMan/pyenv,syndbg/goenv,UCASREN/pyenv,VShangxiao/pyenv,rowhit/pyenv,xshwy/pyenv,recruit-mtl/pyenv