Fix duplicate section in README

Removed duplicate 'Screenshots' section from README.

Author: ALAADROID

README.md

@@ -14,8 +14,6 @@ This project implements the **Caesar Cipher**, a simple encryption technique whe
 ✅ Written in pure **C** for efficiency and simplicity.
 
 
-## Screenshots
-
 ## Screenshots
 
 |Main Menu|Test|