Add favicon link to index.html

Author: Medicopter117

src/web/index.html

@@ -4,6 +4,7 @@
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>ManagerX - Discord Bot</title>
+    <link rel="shortcut icon" type="image/x-icon" href="favicon.ico">
     <script type="text/javascript">
       // GitHub Pages SPA Index Redirect Hack
       (function(l) {