update title and add logo

examples/nextjs-14-app-dir-rl/README.md

@@ -1,4 +1,11 @@
-# Next.js 14 Rate Limit (App Dir)
+<a href="https://arcjet.com" target="_arcjet-home">
+  <picture>
+    <source media="(prefers-color-scheme: dark)" srcset="https://arcjet.com/arcjet-logo-minimal-dark-mark-all.svg">
+    <img src="https://arcjet.com/arcjet-logo-minimal-light-mark-all.svg" alt="Arcjet Logo" height="128" width="auto">
+  </picture>
+</a>
+
+# Arcjet Rate Limit with Next.js 14 using the App Router
 
 This example shows how to use Arcjet with a Next.js [route
 handler](https://nextjs.org/docs/app/building-your-application/routing/route-handlers).