The `Current State` section of `docs/release-control/internal/CONTROL_PLANE.md`
still described `v6-rc-cut` as the active engineering target and listed
`v6-rc-stabilization` as planned. The active target has been
`v6-rc-stabilization` since the first governed RC shipped, and
`documentation_currentness_test` now fails on that drift. Update items 2, 4,
and 5 to match the current governed state.
rcourtman