CHANGELOG.md in ruboty-1.2.3 vs CHANGELOG.md in ruboty-1.2.4

@@ -1,4 +1,7 @@
+## 1.2.4
+- Improve help command output (thx @k0kubun)
+
 ## 1.2.3
 - User default Logger class (thx @eagletmt)
 
 ## 1.2.2
 - Support ^D on shell adapter (thx @suu-g)