Fix image aspect ratio

Author: Rayrsn

README.md

@@ -3,7 +3,7 @@
 # `🛠️ Discord RPC cli client`
 ## **A Discord RPC cli client written purely in Rust**
  <p align="center">
-  <img width=70% height=70% src="https://github.com/Rayrsn/Discord-Custom-RPC/raw/main/images/preview_win.png?raw=true">
+  <img width="70%" src="https://github.com/Rayrsn/Discord-Custom-RPC/raw/main/images/preview_win.png?raw=true">
 </p>
 
 [![Status Badge](https://github.com/Rayrsn/Discord-RPC-cli/actions/workflows/rust.yml/badge.svg)](https://github.com/Rayrsn/Discord-RPC-cli/actions/workflows/rust.yml)