Minor update to readme to improve wording
Minor update to readme to improve wording

ms-iot/holobot,msalehmsft/holobot,msalehmsft/holobot,ms-iot/holobot,msalehmsft/holobot,msalehmsft/holobot,ms-iot/holobot,ms-iot/holobot,msalehmsft/holobot