update en-GB translation
update en-GB translation

Change-Id: I10c61f143ffa5e5c1221fb069c9e3dcec2e4b324

fronteerio/canvas-lms,instructure/canvas-lms,narigone/canvas,matematikk-mooc/canvas-lms,grahamb/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,narigone/canvas,snehakachroo1/LSI_replica,HotChalk/canvas-lms,instructure/canvas-lms,snehakachroo1/LSI_replica,HotChalk/canvas-lms,HotChalk/canvas-lms,sfu/canvas-lms,dgynn/canvas-lms,snehakachroo1/LSI_replica,SwinburneOnline/canvas-lms,dgynn/canvas-lms,roxolan/canvas-lms,HotChalk/canvas-lms,fronteerio/canvas-lms,instructure/canvas-lms,grahamb/canvas-lms,venturehive/canvas-lms,redconfetti/canvas-lms,grahamb/canvas-lms,roxolan/canvas-lms,redconfetti/canvas-lms,instructure/canvas-lms,matematikk-mooc/canvas-lms,fronteerio/canvas-lms,grahamb/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,SwinburneOnline/canvas-lms,snehakachroo1/LSI_replica,instructure/canvas-lms,fronteerio/canvas-lms,venturehive/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,redconfetti/canvas-lms,dgynn/canvas-lms,narigone/canvas,SwinburneOnline/canvas-lms,matematikk-mooc/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,roxolan/canvas-lms,roxolan/canvas-lms,grahamb/canvas-lms,matematikk-mooc/canvas-lms,narigone/canvas,SwinburneOnline/canvas-lms,dgynn/canvas-lms,venturehive/canvas-lms,redconfetti/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms