Update CHANGELOG.md

Author: drc38

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Change log
 
-- [#506](https://github.com/mobilityhouse/ocpp/issues/506) Reduce use of NotSupportedError in favor of ValidationError when validating payload. Thanks [@drc38](@https://github.com/drc38).
+- [#506](https://github.com/mobilityhouse/ocpp/pull/506) Replace NotImplementedError with ValidationError when an OSError occurs. Thanks [drc38](@https://github.com/drc38).
 
 ## 2.0.0-rc.2 (2024-06-18)
 
@@ -104,6 +104,7 @@
 
 ## 0.22.0 (2023-11-03)
 
+- [#493](https://github.com/mobilityhouse/ocpp/issues/493) Reduce use of NotSupportedError in favor of NotImplementedError. Thanks [drc38](@https://github.com/drc38).
 - [#278](https://github.com/mobilityhouse/ocpp/pull/278) Fix types for attributes of OCPP 1.6's type `IdTagInfo`. Thanks [@chan-vince](https://github.com/chan-vince)
 - [#504](https://github.com/mobilityhouse/ocpp/pull/504) Add missing tech_info attribute to v2.0.1 EventDataType. Thanks [@LokiHokie](https://github.com/LokiHokie)
 - [#381](https://github.com/mobilityhouse/ocpp/issues/381) Add FormationError and OccurrenceConstraintViolationError.