Update Changelog for release of version 2.4.1

Author: LaunchDarklyCI

CHANGELOG.md

@@ -2,6 +2,14 @@
 
 All notable changes to the LaunchDarkly Ruby SDK will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org).
 
+## [2.4.1] - 2018-01-23
+## Changed
+- Reduce logging level for missing flags
+- Relax json and faraday dependencies
+## Fixed
+- Wrap redis bulk updates in a transaction
+- Fixed documentation links
+
 ## [2.4.0] - 2018-01-12
 ## Changed
 - Will use feature store if already initialized even if connection to service could not be established.  This is useful when flags have been initialized in redis.