Fix jsDoc for document site (#466)
Fix jsDoc for document site (#466)

* Fix jsDoc for document site

* "Get a column group" -> "Get a row group"

Co-authored-by: Jona Andersen <32067c66eb223ac1390e4ab6e1c57ac609af0eba@gmail.com>
TonyGermaneri/canvas-datagrid,TonyGermaneri/canvas-datagrid