update ru translation
update ru translation

Change-Id: I826b3af6449ed9ab34233b1c10170f5c6023d40f
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/299823
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