update mpy-cross macOS build to macos 11; make macos mpy-cross names consistent
update mpy-cross macOS build to macos 11; make macos mpy-cross names consistent

adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython