update pt-BR translation
update pt-BR translation

Change-Id: I1b28a22c21a6c0c5cc45142dbbe1cd6dc7271f5e

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