feat(docs): update readme with the correct format

readme.txt

@@ -1,6 +1,6 @@
 === Fiber Admin ===
 Contributors: daomapsieucap
-Tags: white label, admin tool, duplicate post, content protection
+Tags: white label, duplicate post, content protection
 Requires at least: 4.7
 Tested up to: 6.5.4
 Requires PHP: 7.4
@@ -10,7 +10,7 @@ License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
 Bring multiple customization features to make your own WordPress admin.
 
-**FEATURES**
+== Description ==
 
 * Use your Site Settings to white label WordPress automatically.
 * Customize admin login page by multiple options.
@@ -24,6 +24,8 @@ Bring multiple customization features to make your own WordPress admin.
 * Disable WordPress comments & WordPress Automatic Updates completely as default.
 * Customize 503 Database Error page.
 
+[Fork the plugin on GitHub.](https://github.com/daomapsieucap/fiber-admin)
+
 == Frequently Asked Questions ==
 
 = Why can't I save the settings for Customized WordPress Database Error page? =