notes: add dnstap PR (#4197)
notes: add dnstap PR (#4197)

few notes that this API also changed.

Signed-off-by: Miek Gieben <00b357f94cf3a1145a32703fb42e2d80418ab806@miek.nl>
johnbelamaric/coredns,chrisohaver/coredns,miekg/coredns,yongtang/coredns,miekg/coredns,coredns/coredns,johnbelamaric/coredns