Fix debian changelog email

Also remove most of the content as we agreed to only list debian related
changes.

Signed-off-by: Rémi Duraffort <remi.duraffort@linaro.org>
16 jobs for changelog in 20 minutes and 41 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #106587
amd64
dispatcher-debian-10

00:03:05

passed #106589
amd64
dispatcher-debian-11

00:03:04

passed #106588
amd64
server-debian-10

00:03:40

passed #106590
amd64
server-debian-11

00:06:22

 
  Analyze
passed #106591
amd64-dind
bandit-sast

00:01:06

passed #106592
amd64
black

00:01:10

passed #106593
amd64
code_quality

00:00:29

passed #106598
amd64
codespell

00:00:19

passed #106594
amd64
coverage

00:07:14

59.48%
passed #106595
amd64
dockerfiles

00:00:21

passed #106597
amd64
pylint

00:03:13

passed #106596
amd64
schemas

00:00:38

 
  Build
passed #106600
amd64
debian/10

00:01:45

passed #106599
amd64
doc

00:01:00

passed #106601
amd64-dind
docker-amd64-dispatcher

00:07:02

passed #106602
amd64-dind
docker-amd64-server

00:07:02