Fix typo
Fix typo

Summary:
Just fix Envionment to Envi**R**onment.
Closes https://github.com/facebook/relay/pull/2243

Differential Revision: D6612996

Pulled By: kassens

fbshipit-source-id: 44a694b297895bf62d6b04ff4fd1860a1936e753

freiksenet/relay,cpojer/relay,iamchenxin/relay,dbslone/relay,voideanvalue/relay,yungsters/relay,freiksenet/relay,yungsters/relay,facebook/relay,kassens/relay,kassens/relay,wincent/relay,voideanvalue/relay,zpao/relay,xuorig/relay,xuorig/relay,kassens/relay,wincent/relay,wincent/relay,xuorig/relay,cpojer/relay,xuorig/relay,iamchenxin/relay,voideanvalue/relay,freiksenet/relay,atxwebs/relay,zpao/relay,yungsters/relay,xuorig/relay,facebook/relay,atxwebs/relay,iamchenxin/relay,cpojer/relay,facebook/relay,kassens/relay,atxwebs/relay,apalm/relay,apalm/relay,kassens/relay,dbslone/relay,wincent/relay,kassens/relay,atxwebs/relay,josephsavona/relay,voideanvalue/relay,josephsavona/relay,xuorig/relay,voideanvalue/relay,facebook/relay,wincent/relay,facebook/relay,josephsavona/relay,apalm/relay,cpojer/relay,wincent/relay,facebook/relay,iamchenxin/relay,voideanvalue/relay,zpao/relay