Update k8s.gcr.io/Vanity-Domain-Flip.md
Update k8s.gcr.io/Vanity-Domain-Flip.md

Co-authored-by: Aaron Crickenberger <4bdea8258b9e85e502cc73788676b46a83dd4b30@google.com>
kubernetes/k8s.io,kubernetes/k8s.io,thockin/k8s.io,thockin/k8s.io,kubernetes/k8s.io,thockin/k8s.io,kubernetes/k8s.io,thockin/k8s.io