docs: 📝 wx qr update

src/views/system/index/page.vue

@@ -8,16 +8,12 @@
           <span class="btn-group__btn" @click="$open('https://d2.pub/zh/doc/d2-admin')">文档</span> |
           <span class="btn-group__btn" @click="$open('https://github.com/d2-projects/d2-admin-start-kit')">简化版</span> |
           <span class="btn-group__btn" @click="$open('https://juejin.im/user/57a48b632e958a006691b946/posts')">掘金</span> |
-          <el-popover :width="172" trigger="hover">
-            <p class="d2-mt-0 d2-mb-10">今日前端</p>
-            <img src="./image/qr@2x.png" style="width: 172px;">
+          <el-popover :width="150" trigger="hover">
+            <img src="./image/qr.jpg" style="width: 150px;">
             <span slot="reference" class="btn-group__btn btn-group__btn--link">
               <d2-icon name="weixin"/>
-              微信公众号
+              微信服务号
             </span>
-            <p style="font-size: 12px; margin-top: 0px; margin-bottom: 0px;">
-              官方公众号，主要推送前端技术类文章、框架资源、学习教程，以及 D2 系列项目更新信息
-            </p>
           </el-popover>
         </div>
         <d2-badge/>