WebGPU support warning needs updating for Firefox

https://bevy.org/examples-webgpu/ (and all examples under it) still says

> Support Warning
>
> WebGPU is currently only supported on Chrome starting with version 113, and only on desktop. If they don't work on your configuration, you can check the WebGL2 examples [here](https://bevy.org/examples).

This is now out of date since Firefox also supports WebGPU on Windows as of 141 🎉🥳

Looks like just [`templates/example-webgpu.html`](https://github.com/bevyengine/bevy-website/blob/07248eb936589aaeda4ba6729d443ca65de7bac2/templates/example-webgpu.html#L3) and [`templates/examples-webgpu.html`](https://github.com/bevyengine/bevy-website/blob/07248eb936589aaeda4ba6729d443ca65de7bac2/templates/examples-webgpu.html#L10) that need fixing.