feat: add Baidu site verification meta tag

Author: jinzcdev

index.html

@@ -5,6 +5,7 @@
     <meta http-equiv="X-UA-Compatible" content="IE=edge" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <meta name="google-site-verification" content="W0oWndWYhDcWjrNDTvU-cnL9DOKRBu58OSZ07JZUFhk" />
+    <meta name="baidu-site-verification" content="codeva-688UtsySmt" />
     <title>Try MarkXMind</title>
     <link rel="stylesheet" href="./src/app.css" />
     <link rel="icon" href="/favicon.ico" type="image/x-icon" />