fix: 修复课程详情页面课程类型显示错误的问题

src/pages/learn/course/detail.vue

@@ -101,7 +101,9 @@ export default {
       const map = {
         1: this.$t('action.courseAction.mustLearn'),
         2: this.$t('action.courseAction.changeLearn'),
-        3: this.$t('action.courseAction.repeatLearn')
+        3: this.$t('action.courseAction.repeatLearn'),
+        4: '先修课',
+        5: '语言课'
       }
       return map[this.detail.course_type]
     },