Merge pull request #308 from ember-learn/locks-patch-1

Remove Github parenthetical from Help Wanted contributing link

Author: mansona

addon/constants/links.js

@@ -75,7 +75,7 @@ export default [{
     type: 'link'
   }, {
     href: 'https://help-wanted.emberjs.com/',
-    name: 'Contribute (Github)',
+    name: 'Help Wanted',
     type: 'link'
   }, {
     type: 'divider'