update en-CA translation
update en-CA translation

Change-Id: Ia2ffd159c60c3607857e437208b5df740bb062a8
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/226745
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

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