update en-GB translation
update en-GB translation

Change-Id: I7fc8ad63d03b1720f513bfe4a27d7c223144d52e

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