update nl translation
update nl translation

Change-Id: Iacbfff78c9dc49ef82f106bc23c40005e1cad4ac
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/293183
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

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