update ru translation
update ru translation

Change-Id: Ieb5b021386da97f7233ba1eb24b74acc97be8642
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/215732
Tested-by: Jenkins

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