fix: remove duplicate heading

Author: C-Mejlak

README.mdx

@@ -2,9 +2,6 @@
 disableSidebar: true
 ---
 
-<div className="text-center">
-  # Documentation
-</div>
 <div className="grid grid-cols-1 sm:grid-cols-2 md:grid-cols-3 gap-spacing-6">
   <IndexCard
     className="text-blue-500"