update pt translation
update pt translation

Change-Id: If975388d4f0c94c22e6adf8851056dbacb901697
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/216807
Tested-by: Jenkins

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