Update CONTRIBUTING.md
Update CONTRIBUTING.md
akimasa/Mirakurun,Chinachu/Mirakurun,upsilon/Mirakurun,upsilon/Mirakurun,kanreisa/Mirakurun,akimasa/Mirakurun,kanreisa/Mirakurun,upsilon/Mirakurun,Chinachu/Mirakurun,Chinachu/Mirakurun,Chinachu/Mirakurun,akimasa/Mirakurun,kanreisa/Mirakurun