Update websocket.rs

[DamienDeepgram]

Resolves potential issue with select_biased and fuse() inside loop

Futures and streams which are not already fused can be fused using the .fuse() method. Note, though, that fusing a future or stream directly in the call to select_biased! will not be enough to prevent it from being polled after completion if the select_biased! call is in a loop, so when select_biased!ing in a loop, users should take care to fuse() outside of the loop.

Ref: https://docs.rs/futures-util/latest/futures_util/macro.select_biased.html#:~:text=call%20is%20in%20a%20loop,every%20branch%20in%20a%20select_biased!