fix: Update flatpak command on download page

src/components/download.tsx

@@ -117,7 +117,7 @@ export default function DownloadPage() {
                   <p>
                     <strong>Linux user?</strong><br/>
                     We{"'"}ve recently added support for flatpak! You can download the flatpak version by running the following command:
-                    <pre className="bg-white dark:bg-black p-2 rounded mt-4 overflow-auto">flatpak install flathub io.github.zen_browser</pre>
+                    <pre className="bg-white dark:bg-black p-2 rounded mt-4 overflow-auto">flatpak install flathub io.github.zen_browser.zen</pre>
                   </p>
                 </div>
               )}