Correct link to Getting Started from readme.md
Correct link to Getting Started from readme.md

Diving into the graphql-ruby library was a bit frustrating because the "Getting Started" link in the readme didn't go to the Getting Started page on the website, but to the home page. 

Eventually I found it, but maybe this will save others the trouble.
rmosolgo/graphql-ruby,xuorig/graphql-ruby,xuorig/graphql-ruby,rmosolgo/graphql-ruby,nevesenin/graphql-ruby,rmosolgo/graphql-ruby,nevesenin/graphql-ruby,xuorig/graphql-ruby,nevesenin/graphql-ruby,nevesenin/graphql-ruby,rmosolgo/graphql-ruby