chore: update contributing
chore: update contributing

tommy-boy/AMZNDEALS,TobiasSchaeuble/HMAD,subsolo/ITHC,pierrecabriere/Greencharge,fmsouza/mangiare,tommy-boy/AMZNDEALS,pierrecabriere/Greencharge,francarmona/ionice-contryside-events-app,subsolo/ITHC,subsolo/ITHC,abdolmajidazad/neveshtak,TobiasSchaeuble/HMAD,nReality/SUGSA-ScrumGathering-App2016,fmsouza/mangiare,nReality/AgileAfricaConf-app,francarmona/ionice-contryside-events-app,driftyco/ionic-conference-app,laodice/ionic-conference-app-session2,Beslinda/catalogIonicApp,kumarnavinrai/finalmcu,sinholic/aero-flyer,tommy-boy/AMZNDEALS,nReality/SUGSA-ScrumGathering-App2016,driftyco/ionic-conference-app,nReality/SUGSA-ScrumGathering-App2016,minhlong/NamHoa-Ionic,ericel/weytindey,nReality/AgileAfricaConf-app,nReality/AgileAfricaConf-app,Beslinda/catalogIonicApp,nReality/SUGSA-ScrumGathering-App2016,sinholic/aero-flyer,abdolmajidazad/neveshtak,francarmona/ionice-contryside-events-app,laodice/ionic-conference-app-session2,kumarnavinrai/finalmcu,abdolmajidazad/neveshtak,nReality/SUGSA-ScrumGathering-App2016,fmsouza/mangiare,ericel/weytindey,Beslinda/catalogIonicApp,nReality/AgileAfricaConf-app,sinholic/aero-flyer,laodice/ionic-conference-app-session2,ericel/weytindey,nReality/SUGSA-ScrumGathering-App2016,driftyco/ionic-conference-app,pierrecabriere/Greencharge,minhlong/NamHoa-Ionic,kumarnavinrai/finalmcu,nReality/SUGSA-ScrumGathering-App2016,fmsouza/mangiare,TobiasSchaeuble/HMAD,minhlong/NamHoa-Ionic,nReality/AgileAfricaConf-app,nReality/AgileAfricaConf-app,nReality/AgileAfricaConf-app