update pt translation
update pt translation

Change-Id: I38de5f6bfe7be9759941ca81ae089314a48a2a7e
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/213728
Tested-by: Jenkins

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