Change boxicons -> font awesome

boxicons didn't have a Bluesky logo

layouts/partials/head.html

@@ -15,8 +15,8 @@
     <link href="https://fonts.googleapis.com/css2?family=Caprasimo&display=swap" rel="stylesheet">
     <link href="https://fonts.cdnfonts.com/css/junicode-2" rel="stylesheet">
 
-    <!-- icons -->
-    <link href='https://unpkg.com/boxicons@2.1.4/css/boxicons.min.css' rel='stylesheet'>
+    <!-- Font Awesome -->
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/css/all.min.css">
 
     <!-- pico helps with some basic CSS styling -->
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@picocss/pico@2/css/pico.css">