CI: upgrade actions/setup-python and actions/download-artifact
CI: upgrade actions/setup-python and actions/download-artifact

libmapper/libmapper,malloch/libmapper,libmapper/libmapper,libmapper/libmapper,malloch/libmapper,libmapper/libmapper,malloch/libmapper,libmapper/libmapper,libmapper/libmapper,malloch/libmapper,malloch/libmapper,malloch/libmapper