CHANGELOG.md in rails_state_machine-2.1.1 vs CHANGELOG.md in rails_state_machine-2.2.0

@@ -8,9 +8,17 @@
 ### Compatible changes
 
 ### Breaking changes
 
 
+## 2.2.0 2023-12-06
+
+### Compatible changes
+
+- Added: State machine can now use the `:prefix` option to avoid name collision if you define multiple state machines
+  on the same model, and use state names more than once
+- Fix bug where additional inclusions of `RailsStateMachine::Model` would reset previous defined state machines
+
 ## 2.1.1 2022-03-16
 
 ### Compatible changes
 
 - Enabled MFA for RubyGems