Minor changes to changelog.

Author: jkakar

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 All notable changes to this project will be documented in this file.
 
-## [Unreleased](https://github.com/jkakar/aws-elixir)
+## [master](https://github.com/jkakar/aws-elixir)
 
 ## [v0.0.3](https://github.com/jkakar/aws-elixir/tree/v0.0.3) - 2015-07-14
 #### Added