Bump `rand` crate to 0.9

[tcoratger]

Currently, rand crate is used with version 0.8:

std/Cargo.toml

Line 16 in b0cbdeb

rand = { version = "0.8", default-features = false, features = ["std_rng"]}

We should bump this to 0.9 (https://github.com/rust-random/rand/releases/tag/0.9.0)

[driemworks]

@tcoratger any timeline on when this might be merged? It would resolve a compatibility issue I'm currently facing.