update font to match lfk 2023 branding

index.html

@@ -6,6 +6,9 @@
     <title>LfK!Beamershow</title>
     <base href="./" />
     <link rel="icon" type="image/png" href="./favicon.png" />
+    <style>
+      * { font-family: "Athiti", sans-serif; }
+    </style>
   </head>
 
   <body class="bg-white font-family-karla h-screen">