Update /builds for 2.6.0-beta.4.
Update /builds for 2.6.0-beta.4.

kpfefferle/website,workmanw/ember-website,bmac/website,kpfefferle/website,SaladFork/emberjs-website,AaronSikes/website,zeppelin/emberjs-website,AaronSikes/website,SaladFork/emberjs-website,SaladFork/emberjs-website,kpfefferle/website,workmanw/ember-website,josemarluedke/ember-website,bmac/website,zeppelin/emberjs-website,zeppelin/emberjs-website,josemarluedke/ember-website,bmac/website,josemarluedke/ember-website,josemarluedke/ember-website,AaronSikes/website,workmanw/ember-website,workmanw/ember-website,zeppelin/emberjs-website,SaladFork/emberjs-website,bmac/website