`ChaCha20With64BitNonce.stream` uses wrong type for `counter` parameter

[yanchan09]

Zig Version

0.13.0

Steps to Reproduce and Observed Behavior

Try to compile code that uses std.crypto.stream.chacha.ChaCha20With64BitNonce.stream:

1. counter parameter is u32 not u64
2. As a result, you also get a compile error from std:

/usr/lib/zig/std/crypto/chacha20.zig:607:50: error: type 'u5' cannot represent integer value '32'
            c[1] = @as(u32, @truncate(counter >> 32));
                                                 ^~

Expected Behavior

ChaCha20With64BitNonce.stream should have counter: u64 parameter like .xor does

[jedisct1]

Thanks!