[MODEL] Fixed typo in CHANGELOG

Closes elastic#364

Author: andrew

elasticsearch-model/CHANGELOG.md

@@ -3,7 +3,7 @@
 * Improved examples and instructions in README and code annotations
 * Prevented index methods to swallow all exceptions
 * Added the `:validate` option to the `save` method for models
-* Added support for searching across multiple models (elastic/elasticsearch-rails#345),
+* Added support for searching across multiple models (elastic/elasticsearch-rails#345),
   including documentation, examples and tests
 
 ## 0.1.6