Merge pull request graphql#320 from hollenberry/source

Update GitHub link to reflect move out of early access

Author: wincent

site/users/index.html.js

@@ -29,7 +29,7 @@ var logos = [
     name: 'GitHub',
     img: 'github.png',
     isRound: true,
-    link: 'https://developer.github.com/%3Cspan%20class="x x-first x-last">early-access/graphql'
+    link: 'https://developer.github.com/%3Cspan%20class="x x-first x-last">v4/'
   },
   {
     name: 'Intuit',