Update README.md

Rename.

README.md

@@ -1,15 +1,15 @@
-# 3DICU
+# OpenUniverse
 3D Infinite Computer Universe
 
 <p align="center">
-  <img src="https://github.com/MatinAfzal/3DICU/assets/128434167/b88d37b6-3135-4314-b1cf-9b5804876794" />
+  <img src="https://github.com/user-attachments/assets/b46ed21d-01a3-499d-95ab-a082da327c81" />
 </p>
 
 <h3 align="center">An open source implementation of 3D Computer Universe</h3>
 
 I started programming a computer universe based on voxels in February 2024 and I am trying to make it more complete.   
 This project has a custom built-in 3D rendering engine written using OpenGL
-Any programmer can use the codes in this project to build his own world or help improve ICU.
+Any programmer can use the codes in this project to build his own world or help improve OpenUniverse.
 
 Developer: [@MatinAfzal](https://github.com/MatinAfzal)