update CONTRIBUTING.md
update CONTRIBUTING.md

fischmax/redox,stryan/redox,vvlevchenko/redox,imp/redox,bheesham/redox,stryan/redox,vvlevchenko/redox,bheesham/redox,tedsta/redox,skylerberg/redox,nounoursheureux/redox,skylerberg/redox,achanda/redox,achanda/redox,tedsta/redox,nxnfufunezn/redox,vvlevchenko/redox,nxnfufunezn/redox,skylerberg/redox,fischmax/redox,nounoursheureux/redox,fischmax/redox,stryan/redox,stryan/redox,tedsta/redox,bheesham/redox,nxnfufunezn/redox,fischmax/redox,tedsta/redox,imp/redox,nounoursheureux/redox,bheesham/redox,achanda/redox,skylerberg/redox,imp/redox