SOL002_114 Resource "ThresholdCrossedNotification " updated

src/definitions/SOL002SOL003VNFPerformanceManagement_def.yaml

@@ -520,6 +520,8 @@ definitions:
     description: >
       This type represents a notification that is sent when a threshold has
       been crossed.
+      The timing of sending this notification is determined by the capability
+      of the producing entity to evaluate the threshold crossing condition.
       The notification shall be triggered by the VNFM when a threshold has
       been crossed.
     type: object