Update dependency font-awesome to v7

Author: renovate[bot]

index.html

@@ -49,7 +49,7 @@
     <meta property="twitter:image" content="./demo.png" />
     <link
       rel="stylesheet"
-      href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css"
+      href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/7.0.0/css/font-awesome.min.css"
     />
     <link
       rel="stylesheet"