community/coredns: upgrade to 1.9.3
Release notes: https://github.com/coredns/coredns/blob/v1.9.3/notes/coredns-1.9.3.md
includes fixes for CVE-2022-27191 and CVE-2022-28948
Release notes: https://github.com/coredns/coredns/blob/v1.9.3/notes/coredns-1.9.3.md
includes fixes for CVE-2022-27191 and CVE-2022-28948