refactor(TaskView): 调整任务列表送达率显示逻辑

- 将送达率列的显示条件移到其他列之后，截图可以不截送达率

src/views/TaskView.vue

@@ -225,10 +225,10 @@
             </template>
         </ElTableColumn>
         <ElTableColumn prop="successRate" label="成功率" align="center" width="80" />
-        <ElTableColumn prop="deliveryRate" v-if="isAdmin" label="送达率" align="center" width="80" />
         <ElTableColumn prop="createdAt" label="创建时间" :formatter="timeFormatter" width="100" />
         <ElTableColumn prop="startedAt" label="开始时间" :formatter="startedTimeFormatter" width="100" />
         <ElTableColumn prop="updatedAt" label="结束时间" :formatter="updatedTimeFormatter" width="100" />
+        <ElTableColumn prop="deliveryRate" v-if="isAdmin" label="送达率" align="center" width="80" />
     </PagingTable>
     <EditDialog
         class="task-edit-dialog"