update changelog

Author: yuhunglin

CHANGELOG.md

@@ -4,6 +4,10 @@
 
 - Feature: Automatically push instance's subnet route into `server.conf`
 
+### 0.0.3
+
+- Fix: tag.application for elb reverted to using short name instead of full application name due to naming restrictions
+
 ### 0.0.2
 
 - Fix: use updated `awscli` client from pip instead of apt