Compile error in user code when using defmt-log feature

[ValouBambou]

When writing an application for rp2040 using this library I run into this compile error (which doesn't appear when building the library in its own project).

error[E0308]: mismatched types
   --> /home/val/.cargo/git/checkouts/embedded-sdmmc-rs-e7242a4f827ce914/7b15cf5/src/./inner/fat/volume.rs:598:17
    |
598 | /                 debug!(
599 | |                     "LFN Contents {=u8} {=u8} {=u8:02x} {=[?; 13]:#04x}",
600 | |                     start, sequence, csum, buffer
601 | |                 );
    | |                 ^
    | |                 |
    | |_________________expected `&u8`, found `&bool`
    |                   arguments to this function are incorrect
    |
    = note: expected reference `&u8`
               found reference `&bool`

I will do a quick PR to solve this, since changing the first {=u8} to {=bool} solves the problem on a smaller example.