Fixes #9767 Undici [tries to import `./llhttp/llhttp.wasm.js`](https://github.com/nodejs/undici/blob/e155c6db5cec9bc577d548fa7c7378013631c79c/lib/client.js#L342) which is currently broken by the (hacky) module name mapper.
Fixes #9767 Undici [tries to import `./llhttp/llhttp.wasm.js`](https://github.com/nodejs/undici/blob/e155c6db5cec9bc577d548fa7c7378013631c79c/lib/client.js#L342) which is currently broken by the (hacky) module name mapper.