Don't hardcode the colorFormat if you want it to work under Linux

[amanning26-crypto]

Starting with the triangle basics:
//const colorState = {
// format: 'bgra8unorm'
//};
// don't hardcode the format. Linux uses a different one use this instead to make it more compatible
// thanks to gemini for helping with this :)
const colorState = {
format: navigator.gpu.getPreferredCanvasFormat()
};