update en-CA translation
update en-CA translation

Change-Id: I815e3f7d306ce4fe0b0c8bd01dd1f82ff4d555fb
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/246427
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