feat: add cat README.md to demo terminal hints

Author: grega

website/src/pages/demo.astro

@@ -78,6 +78,7 @@ import Terminal from "../components/Terminal.astro";
       <code data-hint="hdi needs">hdi needs</code>
       <code data-hint="hdi --full">hdi --full</code>
       <code data-hint="hdi --raw">hdi --raw</code>
+      <code data-hint="cat README.md">cat README.md</code>
     </footer>
   </main>
 </Layout>