删除图标调整

src/views/exercise_questions/preview/components/common/SoundRecordPreview.vue

@@ -48,7 +48,7 @@
       </div>
       <div class="sound-item">
         <span :class="['sound-item-span sound-item-btn', wavBlob ? '' : 'not-url']" @click="delectWav">
-          <SvgIcon icon-class="delete-back-line" :size="iconSize" :class="['delete-btn']" />
+          <SvgIcon icon-class="delete" :size="iconSize" :class="['delete-btn']" />
         </span>
         <label v-if="type === 'big'" class="tips">删除</label>
       </div>