cmd: switch back to default repo for python3
Created by: bobheadxi
This might be bad because https://pkgs.alpinelinux.org/packages?name=python3&branch=v3.12&repo=main indicates we'll get python 3.8 while the previous change required 3.9, but the build passes locally - maybe something has changed? putting this up just to see how it does in CI
It seems the edge repo got updated introducing an incompatibility that is currently failing all builds on main:
#7 3.164 ERROR: unable to select packages:
#7 3.186 libffi-3.3-r2:
#7 3.186 conflicts: libffi-3.4.2-r0
#7 3.186 satisfies: python2-2.7.18-r0[so:libffi.so.7]
#7 3.186 libffi-3.4.2-r0:
#7 3.186 conflicts: libffi-3.3-r2
#7 3.186 satisfies: python3-3.9.7-r3[so:libffi.so.8]