readme: show https clone url
readme: show https clone url

The git:// transport is vulnerable to man-in-the-middle and DNS
spoofing attacks and its use over untrusted networks should be
discouraged.

Change to the https:// clone url in the install instructions.

CristianCantoro/nvm,PeterDaveHelloKitchen/nvm,domenicosolazzo/nvm,fnogatz/swivm,nontage24/nvm,christophercaburog/nvm,cnpm/nvm,JanChw/nvm,kmctown/nvm,DigitallySeamless/nvm,thomasf/nvm,icyflame/nvm,LeeLovCY/nvm,wskplho/nvm,Kuzirashi/nvm,appleboy/nvm,evocateur/nvm,icyflame/nvm,cnpm/nvm,xtuple/nvm,gtdeng/nvm,JasonChrYoung/nvm,edwmurph/nvm,SampleLiao/nvm,youleiy/nvm,bevacqua/nvm,JasonChrYoung/nvm,Richardphp/nvm,jhliberty/nvm,chinazhaghai/nvm,woss/nvm,egilkh/nvm,egilkh/nvm,ljharb/nvm,bbuck/nvm,sjfkai/nvm,misterdjules/nvm,kumaria/nvm,Salahudeen/nvm,ljharb/nvm,bbuck/nvm,cjac/nvm,modulexcite/nvm,mirydz/nvm,tlevine/nvm,joneit/nvm,wahyutaufik/nvm,modulexcite/nvm,pmq20/nvm,jaawerth/nvm,dfackler/nvm,JanChw/nvm,owen-it/nvm,domenicosolazzo/nvm,Richardphp/nvm,psychoss/nvm,WY08271/nvm,misterdjules/nvm,jhliberty/nvm,vinaykaradia/clone-nvm,Ingelheim/nvm,christophercaburog/nvm,slariviere/nvm,psychoss/nvm,chinazhaghai/nvm,DigitallySeamless/nvm,PeterDaveHelloKitchen/nvm,kumaria/nvm,greyhwndz/nvm,WY08271/nvm,youleiy/nvm,mmorejon/nvm,CristianCantoro/nvm,creationix/nvm,hanhailong/nvm,devedbox/nvm,Theodeus/nvm,tlevine/nvm,diegofcb10/nvm,NicCollins/nvm,michael-ni/nvm,parasaro92/nvm,lukechilds/nvm,cjac/nvm,elrasguno/nvm,michael-ni/nvm,PeterDaveHello/nvm,elrasguno/nvm,LeeLovCY/nvm,parasaro92/nvm,reybango/nvm,SampleLiao/nvm,joneit/nvm,hkdobrev/nvm,nontage24/nvm,vinaykaradia/clone-nvm,thomasf/nvm,diegofcb10/nvm,cirosantilli/nvm,wahyutaufik/nvm,IonicaBizauKitchen/nvm,scq000/nvm,devedbox/nvm,tianzhihen/nvm,williamboman/nvm,jbergstroem/nvm,edwmurph/nvm,woss/nvm,owen-it/nvm,williamboman/nvm,hkdobrev/nvm,greyhwndz/nvm,Salahudeen/nvm,slariviere/nvm,Theodeus/nvm,reybango/nvm,mirydz/nvm,Kuzirashi/nvm,cirosantilli/nvm,pmq20/nvm,lukechilds/nvm,wskplho/nvm,gtdeng/nvm,jaawerth/nvm,jbergstroem/nvm,scq000/nvm,creationix/nvm,hanhailong/nvm,IonicaBizauKitchen/nvm,tianzhihen/nvm,dfackler/nvm,mmorejon/nvm,bevacqua/nvm,PeterDaveHello/nvm,evocateur/nvm,Ingelheim/nvm,kmctown/nvm