Update enumeration-classes-over-enum-types.md (#24236)

Author: IEvangelist

docs/architecture/microservices/microservice-ddd-cqrs-patterns/enumeration-classes-over-enum-types.md

@@ -58,9 +58,9 @@ You can use this class as a type in any entity or value object, as for the follo
 public class CardType
     : Enumeration
 {
-    public static CardType Amex => new(1, nameof(Amex));
-    public static CardType Visa => new(2, nameof(Visa));
-    public static CardType MasterCard => new(3, nameof(MasterCard));
+    public static CardType Amex = new(1, nameof(Amex));
+    public static CardType Visa = new(2, nameof(Visa));
+    public static CardType MasterCard = new(3, nameof(MasterCard));
 
     public CardType(int id, string name)
         : base(id, name)