refactor(marketing): 优惠券类型枚举值描述更新

- 将 "满减" 修改为 "满减券"
- 将 "折扣" 修改为 "折扣券"

src/main/java/com/xynet/marketing/enums/CouponTypeEnum.java

@@ -15,8 +15,8 @@ import java.util.Map;
 @Getter
 @AllArgsConstructor
 public enum CouponTypeEnum {
-    T_1("1", "满减"),
-    T_2("2", "折扣");
+    T_1("1", "满减券"),
+    T_2("2", "折扣券");
     private String code;
 
     private String value;