Fix small comment typo
Fix small comment typo

jwomeara/PDAL,lucadelu/PDAL,mtCarto/PDAL,jwomeara/PDAL,radiantbluetechnologies/PDAL,boundlessgeo/PDAL,boundlessgeo/PDAL,lucadelu/PDAL,radiantbluetechnologies/PDAL,lucadelu/PDAL,boundlessgeo/PDAL,DougFirErickson/PDAL,mtCarto/PDAL,radiantbluetechnologies/PDAL,jwomeara/PDAL,mpgerlek/PDAL-old,DougFirErickson/PDAL,DougFirErickson/PDAL,mpgerlek/PDAL-old,boundlessgeo/PDAL,mpgerlek/PDAL-old,Sciumo/PDAL,radiantbluetechnologies/PDAL,Sciumo/PDAL,Sciumo/PDAL,mpgerlek/PDAL-old,jwomeara/PDAL,DougFirErickson/PDAL,lucadelu/PDAL,mtCarto/PDAL,mtCarto/PDAL,Sciumo/PDAL