so I duplicated it and modified it for UpperHex
```
impl<'a> UpperHex for Bytes<'a> {
    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
        write!(f, "{:#02X?}", self.0)
    }
}
```

And just wrap a reference to my u8 array in that and it compiles now