update nl translation
update nl translation

Change-Id: I3ee3f3024b13d65d08d70f52d6aa18b529ba65f9
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/216805
Tested-by: Jenkins

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