Instructions may need to include python3 as a dependency

[voltagex]

I got up to https://github.com/LNH-team/dspico/blob/develop/GUIDE.md#5-compiling-the-dspico-firmware and hit

#22 1.486 Using board configuration from /src/dspico-firmware/pico-sdk/src/boards/include/boards/pico.h
#22 1.509 CMake Error at /usr/share/cmake-3.28/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
#22 1.509   Could NOT find Python3 (missing: Python3_EXECUTABLE Interpreter)

This is probably because I used a slim docker image as a base to build from