update nl translation
update nl translation

Change-Id: Idcb5f487de0cb8c0c48566c062d5e6b52d88db19
Reviewed-on: https://gerrit.instructure.com/210344
Tested-by: Jenkins

instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms