update en-GB translation
update en-GB translation

Change-Id: I3184c755cb2cf51149fa70cd1ca6dd7e2b259e56

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