Update index.html

index.html

@@ -5,7 +5,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <meta name="description" content="A simple website for GitHub Pages">
     <title>My GitHub Pages Site</title>
-    <style>
+    <link rel="stylesheet" href="css/style.css">
         body {
             font-family: Arial, sans-serif;
             margin: 0;