update pt translation
update pt translation

Change-Id: I866915c4904d605fcf778246234e0f88ef81e36b
Reviewed-on: https://gerrit.instructure.com/212849
Tested-by: Jenkins

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