NEWS, docs: update dns64 info

5 jobs from dns64-cname in 29 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
canceled #72892
docker linux amd64
build:linux:amd64

passed #21620
docker linux amd64
build:linux:amd64

00:00:34

 
  Test
passed #21622
docker linux amd64
deckard:linux:amd64

00:00:29

canceled #21623
docker linux amd64 allowed to fail
respdiff:linux:amd64

00:00:08

passed #21621
docker linux amd64
test:linux:amd64

00:00:18