fix typos and add announcement
fix typos and add announcement
garrypolley/lc101-kc,garrypolley/lc101-kc,machinelearningdeveloper/lc101-kc,garrypolley/lc101-kc,machinelearningdeveloper/lc101-kc,machinelearningdeveloper/lc101-kc,machinelearningdeveloper/lc101-kc,garrypolley/lc101-kc,garrypolley/lc101-kc,machinelearningdeveloper/lc101-kc