update pt translation
update pt translation

Change-Id: I85ee4f3d34eac4da0b8eb7b21bcb0753d60ba6cc
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/256818
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

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