Update README.md

Updated logo

README.md

@@ -1,7 +1,6 @@
-<picture>
-  <source width="150px" media="(prefers-color-scheme: dark)" srcset="https://user-images.githubusercontent.com/7083109/226196409-dc77e5ef-4036-482f-93f1-6f83b800b088.png">
-  <img width="150px" alt="GPTSwift Logo. Light: 'Light Mode' Dark: 'Dark Mode'" src="https://user-images.githubusercontent.com/7083109/226196411-2913b92f-e993-4ad2-8da9-79ac63f237b3.png">
-</picture>
+<p align="center">
+  <img width="200" height="200" src="https://user-images.githubusercontent.com/7083109/231765874-eeb1bb37-d945-4770-8570-d1014c0c857d.png">
+</p>
 
 # GPTSwift
 [![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2FSwiftedMind%2FGPTSwift%2Fbadge%3Ftype%3Dswift-versions)](https://swiftpackageindex.com/SwiftedMind/GPTSwift)