fix: missing favicon link

Author: xidedix

src/index.html

@@ -17,6 +17,7 @@
     <meta name="keyword" content="Bootstrap,Admin,Template,Open,Source,jQuery,CSS,HTML,RWD,Dashboard">
     <title>CoreUI Free Bootstrap Admin Template</title>
     <!-- Icons-->
+    <link rel="icon" type="image/ico" href="./img/favicon.ico" sizes="any" />
     <link href="node_modules/@coreui/icons/css/coreui-icons.min.css" rel="stylesheet">
     <link href="node_modules/flag-icon-css/css/flag-icon.min.css" rel="stylesheet">
     <link href="node_modules/font-awesome/css/font-awesome.min.css" rel="stylesheet">