update pt-BR translation
update pt-BR translation

Change-Id: I1598c782d4ccfdc53b96d5318cadaed32b55465a

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