修改默认标题

src/index.html

@@ -12,7 +12,7 @@
     <!-- <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" /> -->
     <!-- <meta http-equiv="Pragma" content="no-cache" /> -->
     <!-- <meta http-equiv="Expires" content="0" /> -->
-    <title>在线学习系统</title>
+    <title>登录</title>
     <meta
       name="viewport"
       id="viewport"