update pt-BR translation
update pt-BR translation

Change-Id: I2e51cafb5295266e0ae7e0988a7121fb74128aa4

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