README.md in embulk-input-redshift-0.8.5 vs README.md in embulk-input-redshift-0.8.6

@@ -63,10 +63,10 @@
 
 ```
 SELECT * FROM (
   ...original query is here...
 )
-WHERE created_at > '2017-01-01 00:32:12' OR (created_at = '2017-01-01 00:32:12' AND id > 5291)
+WHERE updated_at > '2017-01-01 00:32:12' OR (updated_at = '2017-01-01 00:32:12' AND id > 5291)
 ORDER BY updated_at, id
 ```
 
 Then, it updates `last_record: ` so that next execution uses the updated last_record.