fix: shorten reason code

lib/ocpp/v201/smart_charging.cpp

@@ -119,7 +119,7 @@ std::string profile_validation_result_to_reason_code(ProfileValidationResultEnum
     case ProfileValidationResultEnum::InvalidProfileType:
         return "InternalError";
     case ProfileValidationResultEnum::InvalidSecurityProfile:
-        return "InvalidSecurityProfile";
+        return "LowSecurityProfile";
     }
 
     throw std::out_of_range("No applicable reason code for provided enum of type ProfileValidationResultEnum");