Issue #3: Add link bug XXX to CHANGELOG.

Author: mcomella

CHANGELOG.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ## [Unreleased]
 ### Added
 - Link "unlabeled" in Story Points to an issue query for unlabeled issues
+- Link "Bug 123" to Bugzilla in issue comments
 
 ## [0.4.2] - 2018-09-14
 ### Fixed