Fix collaboration notification schema types

src/modules/notifications/schemas/notification.schema.ts

@@ -15,6 +15,9 @@ export const NOTIFICATION_TYPES = [
   'reply',
   'system',
   'collaboration_request',
+  'collaboration_request_approved',
+  'collaboration_request_rejected',
+  'collaboration_request_cancelled',
   'follow_request',
   'follow_request_approved',
   'follow_request_rejected',