Replace host with real one

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

lib/version_check.rb

@@ -12,8 +12,7 @@ class VersionCheck
     "#{host}?gitlab_info=#{encoded_data}"
   end
 
-  # FIXME: Replace with version.gitlab.com
   def host
-    'http://localhost:9090/check.png'
+    'https://version.gitlab.com/check.png'
   end
 end