修改bug

src/components/base/Protocol.vue

@@ -5,7 +5,9 @@ const dialogVisible = ref(false)
 <template>
   <div>我已阅读并同意<span @click="dialogVisible = true">《紫荆教育用户入驻及网络教学资源协议》</span></div>
   <el-dialog v-model="dialogVisible" title="提示" width="850px">
-    <PreviewFiles url="https://webapp-pub.ezijing.com/upload/admin/fdf5aa303c802c940884bbc1084bfddd.pdf"></PreviewFiles>
+    <PreviewFiles
+      url="https://webapp-pub.oss-cn-beijing.aliyuncs.com/center_resource/%E7%B4%AB%E8%8D%86%E6%95%99%E8%82%B2%E7%94%A8%E6%88%B7%E5%85%A5%E9%A9%BB%E5%8F%8A%E7%BD%91%E7%BB%9C%E6%95%99%E5%AD%A6%E8%B5%84%E6%BA%90%E5%8D%8F%E8%AE%AE(1).docx"
+    ></PreviewFiles>
     <template #footer>
       <span class="dialog-footer">
         <el-button type="primary" @click="dialogVisible = false">我已阅读并同意</el-button>