docs/sig-release: Add SIG docs shadows to sig-release and sig-release-shadows google groups.
docs/sig-release: Add SIG docs shadows to sig-release
and sig-release-shadows google groups.

This change removes the previous shadows batch for the
docs release from sig-release-shadows google group and
adds the current v1.22 team.

Signed-off-by: Victor Palade <88fa846e5f8aa198848be76e1abdcb7d7a42d292@cloudflavor.io>

kubernetes/k8s.io,kubernetes/k8s.io,kubernetes/k8s.io,kubernetes/k8s.io