[Icon update detected by Github Action]. Auto generated pull request. (#2519)

Co-authored-by: Material Design Service Account <[email protected]>

Author: github-actions[bot]

MaterialDesignThemes.Wpf/PackIconKind.cs

@@ -7458,8 +7458,10 @@ public enum PackIconKind
         MessageArrowRight,
         MessageArrowRightOutline,
         MessageBadge,
+        MessageNotification=MessageBadge,
         MessageUnread=MessageBadge,
         MessageBadgeOutline,
+        MessageNotificationOutline=MessageBadgeOutline,
         MessageUnreadOutline=MessageBadgeOutline,
         MessageBookmark,
         MessageBookmarkOutline,