Update CHANGELOG.md

Author: duchatran

CHANGELOG.md

@@ -5,6 +5,7 @@ This file lists changes made in each version of function repo
 ## 1.2.2:
 July 11, 2016: 
 * Merged [PR#12](https://github.com/SumoLogic/sumologic-aws-lambda/pull/12). 
+
 ## 1.2.1:
 Apr 05, 2016
 * Merged [PR#7](https://github.com/SumoLogic/sumologic-aws-lambda/pull/7).