update ru translation
update ru translation

Change-Id: I03a59ef71c0d0a606a9263eacbd5949ca0ef257a
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/280568
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