修改优惠券枚举错别字

mec-biz/src/main/java/com/ym/mec/biz/dal/enums/CouponDetailTypeEnum.java

@@ -29,7 +29,7 @@ public enum CouponDetailTypeEnum {
     //网管课
     PRACTICE("PRACTICE", "网管课"),
     //声部课 = 单技课 SINGLE、集训单技课 TRAINING_SINGLE
-    SINGLE("SINGLE,", "声部课"),
+    SINGLE("SINGLE", "声部课"),
     //合奏课 = 合奏课 MIX、集训合奏课 TRAINING_MIX ,
     MIX("MIX", "合奏课"),
     //VIP = vip课 VIP +乐理课 THEORY_COURSE