Update public/index.html

public/index.html

@@ -388,7 +388,7 @@
         <div>总用户数: <span id="totalUsers">0</span></div>
         <div>总实例数: <span id="totalServers">0</span></div>
         <div>在线实例: <span id="onlineServers">0</span></div>
-        <div>离线实例: <span id="offlineServers">0</span></div
+        <div>离线实例: <span id="offlineServers">0</span></div>
         <div>总上传: <span id="totalUpload">0 B/s</span></div>
         <div>总下载: <span id="totalDownload">0 B/s</span></div>
       </div>