Firmware flashing instructions in `ReadMe.md` only target hardware "MacBook" or operating system "Windows". Confusing types, and missing GNU/Linux.

[dreirund]

Ahoj,

in the ReadMe.md, there is a section

How to flash new firmware

which contains only sections

For MacBook user:

and

For Windows user:

This misses out

• Apple users which do not use a "MacBook" (I suggest a better phrasing there: As with "Windows", refer to the operating system and not to the hardware, e.g. "macOS". "MacBook"s can even be used with GNU/Linux, your instructions would not apply there even though it is a "MacBook".
• Other operating systems, where a mainstream operating system family is GNU/Linux.

Regards!