Update ziggurat.zig to use `random.int(u64)`
Update ziggurat.zig to use `random.int(u64)`

Ziggurat rng was using deprecated `random.scalar(u64)` which was causing compile errors on calls to public facing stdlib APIs (randExp) on 0.6+, this fixed those errors.
raulgrell/zig,andrewrk/zig,raulgrell/zig,raulgrell/zig,raulgrell/zig,zig-lang/zig,raulgrell/zig,zig-lang/zig,zig-lang/zig,andrewrk/zig