Update CONTRIBUTING.md

Author: twitchard

CONTRIBUTING.md

@@ -9,7 +9,7 @@ bun install
 To run:
 
 ```bash
-bun run index.ts
+bun run src/index.ts
 ```
 
 This project was created using `bun init` in bun v1.2.1. [Bun](https://bun.sh) is a fast all-in-one JavaScript runtime.