update changelog

Author: tiagoschenkel

CHANGELOG.md

@@ -26,7 +26,7 @@
 
 - Improve webpack configuration used to run example project. The `npm start` script will generate hashed files (to avoid browser cache) and open the broswer automatically (see #5).
 
-- Migrate to Headless Chrome and improve performance of Karma (see #15).
+- Migrate to Headless Chrome and improve performance of Karma (see #16).
 
 - Update dev dependencies to latest version.