Update Community-LearningResources.md (#2857)
Update Community-LearningResources.md (#2857)

Summary:
Add new resource, where is used the newest version of Relay (`6.0.0`) with React (`16.9.0`).
Pull Request resolved: https://github.com/facebook/relay/pull/2857

Differential Revision: D17712787

Pulled By: kassens

fbshipit-source-id: 3b763794e4ab0c3b5f192ef439588c32697b6bfb

cpojer/relay,xuorig/relay,wincent/relay,kassens/relay,voideanvalue/relay,iamchenxin/relay,kassens/relay,kassens/relay,cpojer/relay,atxwebs/relay,facebook/relay,iamchenxin/relay,wincent/relay,facebook/relay,iamchenxin/relay,cpojer/relay,atxwebs/relay,xuorig/relay,josephsavona/relay,voideanvalue/relay,facebook/relay,xuorig/relay,facebook/relay,kassens/relay,wincent/relay,voideanvalue/relay,iamchenxin/relay,josephsavona/relay,atxwebs/relay,kassens/relay,yungsters/relay,xuorig/relay,yungsters/relay,voideanvalue/relay,wincent/relay,facebook/relay,wincent/relay,voideanvalue/relay,atxwebs/relay,cpojer/relay,wincent/relay,josephsavona/relay,xuorig/relay,xuorig/relay,facebook/relay,yungsters/relay,kassens/relay,voideanvalue/relay