Typo in the include guard in LXESP32DMX.h

[coma0815]

Hi Claude,

I guess there is a mistake in /src/LXESP32DMX.h in line 55.
It should be
#define LX32DMX_H
instead of
#define LX32MX_H.

Like this right now the include guard is not working properly.

Thanks for this library btw.
BR Constantin