Update reference from brunch to webpack in endpoint docs
Update reference from brunch to webpack in endpoint docs

pap/phoenix,0x00evil/phoenix,optikfluffel/phoenix,optikfluffel/phoenix,evax/phoenix,rafbgarcia/phoenix,evax/phoenix,pap/phoenix,jwarwick/phoenix,Gazler/phoenix,nshafer/phoenix,mitchellhenke/phoenix,rafbgarcia/phoenix,keathley/phoenix,mitchellhenke/phoenix,Kosmas/phoenix,dmarkow/phoenix,eksperimental/phoenix,eksperimental/phoenix,Joe-noh/phoenix,keathley/phoenix,rafbgarcia/phoenix,0x00evil/phoenix,mobileoverlord/phoenix,0x00evil/phoenix,michalmuskala/phoenix,nshafer/phoenix,Joe-noh/phoenix,michalmuskala/phoenix,Gazler/phoenix,Kosmas/phoenix,phoenixframework/phoenix,mschae/phoenix,phoenixframework/phoenix,mschae/phoenix,optikfluffel/phoenix,mobileoverlord/phoenix,phoenixframework/phoenix,jwarwick/phoenix,nshafer/phoenix,dmarkow/phoenix