fix: 增加提示

eladmin-system/src/main/java/cn/ysk/cashier/dto/shoptable/AddCartDTO.java

@@ -18,7 +18,7 @@ public class AddCartDTO {
     private Integer shopId;
     private String tableId;
     @NotNull
-    @DecimalMin("0.01")
+    @DecimalMin(value = "0.01", message = "数量最小为0.01")
     private BigDecimal num;
     private boolean isPack;
     private boolean isGift;