Update README.md

Author: LuaanNguyen

README.md

@@ -2,7 +2,9 @@
 
 This repository contains my solutions to LeetCode problems in [Go](https://go.dev/).
 
-<img src="https://raw.githubusercontent.com/gist/brudnak/6c21505423e4ff089ab704ec79b5a096/raw/b2d3dec32474b2121b179920734b259323a7c250/go.gif" alt="Go" width="200"/>
+<div align="center">
+  <img src="https://raw.githubusercontent.com/gist/brudnak/6c21505423e4ff089ab704ec79b5a096/raw/b2d3dec32474b2121b179920734b259323a7c250/go.gif" alt="Go" width="400"/>
+</div>
 
 ## Folder Structure 🗂️