update en-CA translation
update en-CA translation

Change-Id: Ie5b06e357dded8adafcec4bd284dbbbbdd86b806
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/297621
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