update fa translation
update fa translation

Change-Id: Iff0ecb11cb8e5dd9d18ca729a1a25172405f65d1
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/287388
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

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