add --detail to 'pdal delta' doc
add --detail to 'pdal delta' doc

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