update pt-BR translation
update pt-BR translation

Change-Id: Icd4ea7127515b86913e8a38b1fcca7992f00224e

sfu/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,djbender/canvas-lms,SwinburneOnline/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms,SwinburneOnline/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,venturehive/canvas-lms,grahamb/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,SwinburneOnline/canvas-lms,grahamb/canvas-lms,SwinburneOnline/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,grahamb/canvas-lms,venturehive/canvas-lms