feat: 用户协议调整

mec-biz/src/main/java/com/ym/mec/biz/service/impl/StudentManageServiceImpl.java

@@ -164,7 +164,7 @@ public class StudentManageServiceImpl implements StudentManageService {
             }
 
             if(userContractVersionMap.containsKey(dto.getUserId())){
-                dto.setContractVersions(StringUtils.join(userContractVersionMap.get(dto.getUserId())));
+                dto.setContractVersions(StringUtils.join(userContractVersionMap.get(dto.getUserId()), ","));
             }
         }