Update header.php bootstrap subdir in css removed

mymodule/themes/fancytheme/default/includes/header.php

@@ -47,7 +47,7 @@ header('X-Frame-Options: SAMEORIGIN');
 <link rel="icon" type="image/icon" href="/<?php echo $this->data['baseurlpath']; ?>resources/icons/favicon.ico" />
 <title>M4_LAB: User Login</title>
 <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" />
-<link rel="stylesheet" type="text/css" href="/css/bootstrap/bootstrap.css"/>
+<link rel="stylesheet" type="text/css" href="/css/bootstrap.css"/>
 <link rel="stylesheet" type="text/css"  href="/css/Login-Form-Clean.css"/>
 <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.2/css/all.css" integrity="sha384-oS3vJWv+0UjzBfQzYUhtDYW+Pj2yciDJxpsK1OYPAYjqT085Qq/1cq5FLXAZQ7Ay" crossorigin="anonymous">
 <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>