update pt-BR translation
update pt-BR translation

Change-Id: I8dd57f8c4e01fdc5017b9aab5f6a53760c8081c6

sfu/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms