Update CONTRIBUTING.md
Update CONTRIBUTING.md

Fixed a typo based on context (upadting should be updating)
schoren/cdnjs,vfonic/cdnjs,tresni/cdnjs,sujonvidia/cdnjs,Sneezry/cdnjs,xymostech/cdnjs,viskin/cdnjs,mgoldsborough/cdnjs,tmorin/cdnjs,jessepollak/cdnjs,iros/cdnjs,GaryChamberlain/cdnjs,dhowe/cdnjs,viskin/cdnjs,jackdoyle/cdnjs,ematsusaka/cdnjs,raszi/cdnjs,peteygao/cdnjs,iros/cdnjs,tresni/cdnjs,AlexisArce/cdnjs,pcarrier/cdnjs,dhenson02/cdnjs,AlexisArce/cdnjs,khasinski/cdnjs,freak3dot/cdnjs,jackdoyle/cdnjs,xymostech/cdnjs,paleozogt/cdnjs,viskin/cdnjs,dominicrico/cdnjs,emmansun/cdnjs,gaearon/cdnjs,GaryChamberlain/cdnjs,gaearon/cdnjs,zhangbg/cdnjs,algolia/cdnjs,Sneezry/cdnjs,xymostech/cdnjs,dominicrico/cdnjs,pcarrier/cdnjs,paleozogt/cdnjs,gokuale/cdnjs,sujonvidia/cdnjs,peteygao/cdnjs,ljharb/cdnjs,DaAwesomeP/cdnjs,xymostech/cdnjs,aashish24/cdnjs,jessepollak/cdnjs,gokuale/cdnjs,aashish24/cdnjs,dhowe/cdnjs,calvinf/cdnjs,nareshs435/cdnjs,ljharb/cdnjs,dhenson02/cdnjs,nareshs435/cdnjs,peteygao/cdnjs,dominic/cdnjs,dominic/cdnjs,algolia/cdnjs,freak3dot/cdnjs,dhenson02/cdnjs,raszi/cdnjs,calvinf/cdnjs,tmorin/cdnjs,ematsusaka/cdnjs,DaAwesomeP/cdnjs,viskin/cdnjs,emmansun/cdnjs,zhangbg/cdnjs,schoren/cdnjs,khasinski/cdnjs,xymostech/cdnjs,viskin/cdnjs,dhenson02/cdnjs,vfonic/cdnjs,mgoldsborough/cdnjs