Fixed error pages

404.html

@@ -10,7 +10,7 @@
     <title>Error 404 - Not found</title>
     <meta name="description" content="404 Error Page" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
-    <link rel="stylesheet" href="./css/error.css" />
+    <link rel="stylesheet" href="./error.css" />
     <link
       href="https://fonts.googleapis.com/css2?family=Inconsolata:wght@500&display=swap"
       rel="stylesheet"