1.8.5 release note for cache miss metric deprecation (#4857)
1.8.5 release note for cache miss metric deprecation (#4857)

* Note cache miss metric deprecation

* Update notes/coredns-1.8.5.md

Co-authored-by: Miek Gieben <00b357f94cf3a1145a32703fb42e2d80418ab806@miek.nl>

Co-authored-by: Miek Gieben <00b357f94cf3a1145a32703fb42e2d80418ab806@miek.nl>
coredns/coredns,chrisohaver/coredns,yongtang/coredns