fix: 修改选班重新剩余的次数字段为userStudyCount

pages/learn/index.vue

@@ -248,7 +248,7 @@
 							<template
 								v-if="item.gradeStatus == 1 && item.status == 1 && (item.serviceEndTime > sysTime) && (item.serviceStartTime < sysTime) && 
 								(item.classEndTime && (item.classEndTime < sysTime)) && (item.periodStatus == 0 || item.periodStatus == -1) && 
-								item.studyCount > 0">
+								item.userStudyCount > 0">
 								<view class="exam_word ones" @click.stop="selectClass(item,index)">
 									选班重学
 								</view>