fix: Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: AhtishamShahid

openedx/core/djangoapps/notifications/base_notification.py

@@ -25,7 +25,7 @@ class NotificationType(TypedDict):
     notification_app: str
     # Unique identifier for this notification type.
     name: str
-    # Mark this as a use_app_defaults notification.
+    # Whether this notification type uses the notification app's default settings.
     # When True, user preferences are taken from the notification app's configuration,
     # overriding the `web`, `email`, `push`, `email_cadence`, and `non_editable` attributes set here.
     use_app_defaults: bool
@@ -386,7 +386,7 @@ def get_notification_content(notification_type: str, context: dict[str, Any]):
     if notification_type == 'course_update':
         notification_type = 'course_updates'
 
-    # Retrieve the notification type object from NotificationTypeManager.
+    # Retrieve the notification type object from the default preferences (derived from COURSE_NOTIFICATION_TYPES).
     notification_type = get_default_values_of_preferences().get(notification_type, None)
 
     if notification_type: