fix random

[turuslan]

wasm smoldot node always started with same peer id
because .slice() (clone) and .subarray() (mutable reference) were confused
so randomness was not written back to wasm memory

• fix random paritytech/smoldot#3095 (comment)

[tomaka]

Thank you!

This is why I hate JavaScript. I remember thinking about this, but the documentation says "a shallow copy". What the hell does "a shallow copy" even mean in the context of Uint8Array if not that you're sharing the underlying buffer? Anyway. EDIT: I've just noticed that this is only in the French documentation and not the English one

[tomaka]

I've taken the liberty to push a commit with an update to the CHANGELOG.