fix formatted printing warning
fix formatted printing warning

needed to use ZIG_PRI_u64 instead of %lu

andrewrk/zig,raulgrell/zig,raulgrell/zig,andrewrk/zig,raulgrell/zig,raulgrell/zig,zig-lang/zig,raulgrell/zig,zig-lang/zig,zig-lang/zig