Fix typo in README.md (#6439)
Fix typo in README.md (#6439)


Skillupco/babel,kaicataldo/babel,claudiopro/babel,kaicataldo/babel,guybedford/babel,samwgoldman/babel,maurobringolf/babel,shuhei/babel,claudiopro/babel,chicoxyzzy/babel,chicoxyzzy/babel,jridgewell/babel,babel/babel,chicoxyzzy/babel,kaicataldo/babel,hulkish/babel,shuhei/babel,samwgoldman/babel,existentialism/babel,kellyselden/babel,Skillupco/babel,Skillupco/babel,hzoo/babel,maurobringolf/babel,PolymerLabs/babel,kellyselden/babel,kaicataldo/babel,shuhei/babel,babel/babel,babel/babel,samwgoldman/babel,vadzim/babel,PolymerLabs/babel,hulkish/babel,hzoo/babel,existentialism/babel,chicoxyzzy/babel,hzoo/babel,claudiopro/babel,guybedford/babel,kellyselden/babel,hulkish/babel,hulkish/babel,jridgewell/babel,existentialism/babel,PolymerLabs/babel,babel/babel,kellyselden/babel,maurobringolf/babel,vadzim/babel,guybedford/babel,jridgewell/babel,jridgewell/babel,Skillupco/babel,hzoo/babel