Fixed typo in README (#158)
Fixed typo in README (#158)


Lektorium-LLC/edx-sga,Lektorium-LLC/edx-sga,kotky/edx-sga,eduNEXT/edx-sga,kotky/edx-sga,kotky/edx-sga,eduNEXT/edx-sga,mitodl/edx-sga,eduNEXT/edx-sga,eduNEXT/edx-sga,Lektorium-LLC/edx-sga,Lektorium-LLC/edx-sga,kotky/edx-sga,mitodl/edx-sga,mitodl/edx-sga,Lektorium-LLC/edx-sga,kotky/edx-sga,mitodl/edx-sga,eduNEXT/edx-sga,mitodl/edx-sga