Fix badge style

README.md

@@ -21,7 +21,7 @@
 [build]: https://github.com/prefix-dev/pixi/actions/
 [chat-badge]: https://img.shields.io/discord/1082332781146800168.svg?label=&logo=discord&logoColor=ffffff&color=7389D8&labelColor=6A7EC2&style=flat-square
 [chat-url]: https://discord.gg/kKV8ZxyzY4
-[pixi-badge]:https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/prefix-dev/pixi/main/assets/badge/v0.json
+[pixi-badge]:https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/prefix-dev/pixi/main/assets/badge/v0.json&style=flat-square
 [pixi-url]: https://pixi.sh
 
 </h1>