Update SmsFlashPromotionSessionDetail.java

mall-admin/src/main/java/com/macro/mall/dto/SmsFlashPromotionSessionDetail.java

 package com.macro.mall.dto;
 
 import com.macro.mall.model.SmsFlashPromotionSession;
+import io.swagger.annotations.ApiModelProperty;
 import lombok.Getter;
 import lombok.Setter;
 
@@ -11,5 +12,6 @@ import lombok.Setter;
 public class SmsFlashPromotionSessionDetail extends SmsFlashPromotionSession {
     @Setter
     @Getter
+    @ApiModelProperty("商品数量")
     private Long productCount;
 }