Update CONTRIBUTING.md
Update CONTRIBUTING.md
sergey-filipenko/vizabi,Gapminder/vizabi,Gapminder/vizabi,sergey-filipenko/vizabi,Gapminder/vizabi,buchslava/vizabi,buchslava/vizabi,vizabi/vizabi,dab2000/vizabi,sergey-filipenko/vizabi,vizabi/vizabi,dab2000/vizabi,dab2000/vizabi,buchslava/vizabi