fix typo in README
fix typo in README

jason4short/droneshare,dronekit/droneshare,SecureCloud-biz/droneshare,jason4short/droneshare,stromhalm/apo,PHELiOX/droneshare,diydrones/droneshare,nmehta6/fatarrow,PHELiOX/droneshare,SecureCloud-biz/droneshare,dronekit/droneshare,diydrones/droneshare,SecureCloud-biz/droneshare,dronekit/droneshare,PHELiOX/droneshare,diydrones/droneshare,vikram-gsu/FindMyHome,nmehta6/fatarrow,CaryLandholt/fatarrow