docs: update remote links

Author: mnorlin

README.md

@@ -2,7 +2,7 @@
 
 `typed-api-fetch` creates a `fetch` method that mimics the browser native `fetch`, but with added type inference.
 
-It is primarily focused on using the TypeScript definitions generated by [openapi-typescript](https://github.com/drwpow/openapi-typescript), a tool that generates TypeScript definitions from an OpenAPI specification.
+It is primarily focused on using the TypeScript definitions generated by [openapi-typescript](https://github.com/drwpow/openapi-typescript/tree/main/packages/openapi-typescript), a tool that generates TypeScript definitions from an OpenAPI specification.
 
 ## Example