release: add 1.5.0 release notes (#2741)
release: add 1.5.0 release notes (#2741)

* release: add 1.5.0 release notes

Add the release notes to the notes/ directory to prepare for a release.

Signed-off-by: Miek Gieben <00b357f94cf3a1145a32703fb42e2d80418ab806@miek.nl>

* Update notes/coredns-1.5.0.md

Co-Authored-By: miekg <00b357f94cf3a1145a32703fb42e2d80418ab806@miek.nl>

* More

Signed-off-by: Miek Gieben <00b357f94cf3a1145a32703fb42e2d80418ab806@miek.nl>

* Update notes/coredns-1.5.0.md

Co-Authored-By: miekg <00b357f94cf3a1145a32703fb42e2d80418ab806@miek.nl>

johnbelamaric/coredns,miekg/coredns,chrisohaver/coredns,ii/coredns,ii/coredns,johnbelamaric/coredns,yongtang/coredns,miekg/coredns,coredns/coredns