Update performance

index.html

@@ -5,10 +5,10 @@
   <meta charset="UTF-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
-  <title>Convert Code to PDF: Free Online Tool</title>
+  <title>Convert Code to PDF Online: Free Tool for Programming Languages</title>
 
   <meta name="description"
-    content="Convert code to PDF online for free. Supports multiple programming languages and syntax highlighting themes.">
+    content="Convert code to PDF online for free with our tool that supports multiple programming languages and syntax highlighting themes. Get started now!">
   <meta name="keywords"
     content="code to pdf, convert code to pdf, code converter, programming language converter, syntax highlighting, online converter">
   <meta name="author" content="Tarik Jaber">
@@ -25,7 +25,7 @@
 
   <link rel="preconnect" href="https://fonts.googleapis.com">
   <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
-  <link href="https://fonts.googleapis.com/css2?family=Fira+Code&family=Roboto&display=swap" rel="stylesheet">
+  <link defer href="https://fonts.googleapis.com/css2?family=Fira+Code&family=Roboto&display=swap" rel="stylesheet">
 
   <link rel="stylesheet" id="theme-style"
     href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/11.5.1/styles/github-dark.min.css">
@@ -39,7 +39,7 @@
     <h1>
       Code to PDF
       <a href="https://github.com/tarikjaber/Code-to-PDF" target="_blank">
-        <img src="images/github-mark-white.png" alt="GitHub" class="github-icon">
+        <img src="images/github-mark-white.png" alt="GitHub Contribution Icon" class="github-icon">
       </a>
     </h1>
     <div class="options">