update ru translation
update ru translation

Change-Id: I41277b5bd0bb26e3300c7364693a76e03282898a
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/217511
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

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