Update readme for data store specific configuration

README.md

@@ -84,7 +84,7 @@ You can also use Rails form builder with curator models:
 If you are not using Rails, you can configure curator manually:
 
 ```ruby
-Curator.configure do |config|
+Curator.configure(:riak) do |config|
   config.environment = "development"
   config.riak_config_file = File.dirname(__FILE__) + "/config/riak.yml"
 end