readme: update badge to new url
readme: update badge to new url

wxmfront/clappr,leandromoreira/clappr,Peer5/clappr,irongomme/clappr,shakin/clappr,MariadeAnton/clappr,dayvson/clappr,Pyrotoxin/clappr,clappr/clappr,kelonye/clappr,jfairley/clappr,Pyrotoxin/clappr,Pyrotoxin/clappr,tarkanlar/clappr,leandromoreira/clappr,shakin/clappr,MariadeAnton/clappr,clappr/clappr,flavioribeiro/clappr,kelonye/clappr,burakkp/clappr,MariadeAnton/clappr,Peer5/clappr,tarkanlar/clappr,burakkp/clappr,flavioribeiro/clappr,leandromoreira/clappr,Metrakit/clappr,irongomme/clappr,jfairley/clappr,tarkanlar/clappr,Metrakit/clappr,wxmfront/clappr,tjenkinson/clappr,tjenkinson/clappr,clappr/clappr,irongomme/clappr,flavioribeiro/clappr,burakkp/clappr,Metrakit/clappr,jfairley/clappr,tjenkinson/clappr,kelonye/clappr,Peer5/clappr,dayvson/clappr,dayvson/clappr,shakin/clappr,wxmfront/clappr