update nl translation
update nl translation

Change-Id: I8f2689c38a480d069e15708dae1a78f3187f30d6
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/226758
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

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