Setup link to file doesnt work

[TJHeuvel]

https://github.com/eliemichel/WebGPU-Cpp#setup

Copy the file webgpu.hpp file to your C++17 project.

This appears as a link, but that main webgpu.hpp cannot be found. Im unsure how you'd want to link this with them being split between dawn and native.

[eliemichel]

Thanks for spotting this!