[cherry-pick] ensure tag exists before scanning#6962

pdabelf5 merged 1 commit intorelease-4.0nginx/kubernetes-ingress:release-4.0from

cherry-pick-release-4.0-6ce3e721b20bb24ae09fd6568f1ad73fc1a83fbfnginx/kubernetes-ingress:cherry-pick-release-4.0-6ce3e721b20bb24ae09fd6568f1ad73fc1a83fbfCopy head branch name to clipboard