update en-CA translation
update en-CA translation

Change-Id: Ib7a22aa6116eba886e07286b6d6466630433da5d
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/225070
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

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