update it translation
update it translation

Change-Id: I36e9b96a70f351666605e069971550ef7554731b
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/232899
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

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