update en-CA translation
update en-CA translation

Change-Id: Ie720fefbdd2dab57dd3f52f2ea78d53add80a9c6
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/217501
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

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