update pt translation
update pt translation

Change-Id: If28de5318aa9fc34d481de8a2cb43f116b9030be
Reviewed-on: https://gerrit.instructure.com/209794
Tested-by: Jenkins

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