Fix URL links in markdown for SC Codes readme
Fix URL links in markdown for SC Codes readme

jbsteverson/steverson_greenville_project,vzambrano98/leaflet-google-sheets-template,jbsteverson/steverson_greenville_project,codeforgreenville/leaflet-google-sheets-template,codeforgreenville/leaflet-google-sheets-template,vzambrano98/leaflet-google-sheets-template