update ar translation
update ar translation

Change-Id: If220c56519ab7c6fad1f6694cffcb65dd5b10ce2

sfu/canvas-lms,grahamb/canvas-lms,djbender/canvas-lms,HotChalk/canvas-lms,venturehive/canvas-lms,instructure/canvas-lms,grahamb/canvas-lms,SwinburneOnline/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,HotChalk/canvas-lms,fronteerio/canvas-lms,matematikk-mooc/canvas-lms,instructure/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms,instructure/canvas-lms,grahamb/canvas-lms,dgynn/canvas-lms,instructure/canvas-lms,dgynn/canvas-lms,dgynn/canvas-lms,SwinburneOnline/canvas-lms,grahamb/canvas-lms,fronteerio/canvas-lms,sfu/canvas-lms,roxolan/canvas-lms,SwinburneOnline/canvas-lms,fronteerio/canvas-lms,matematikk-mooc/canvas-lms,SwinburneOnline/canvas-lms,HotChalk/canvas-lms,sfu/canvas-lms,HotChalk/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,roxolan/canvas-lms,matematikk-mooc/canvas-lms,roxolan/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,matematikk-mooc/canvas-lms,djbender/canvas-lms,roxolan/canvas-lms,venturehive/canvas-lms,fronteerio/canvas-lms,dgynn/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms