d/changelog: Fix Invalid email addresses

So as to fix bogus-mail-host-in-debian-changelog lintian warning
7 jobs for wip/sadiq/fix-lintian in 9 minutes and 40 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #369510
librem5
build-pureos-gcc-byzantium

00:02:36

 
  Test
passed #369512
librem5
check-po

00:00:19

passed #369511
librem5
test:debian-gcc

00:01:54

21.6%
 
  Package
passed #369513
librem5
package-pureos-byzantium

00:01:39

passed #369514
librem5:arm64
package-pureos-byzantium:arm64

00:05:07

 
  Test Package
passed #369515
librem5
autopkgtest-pureos-byzantium-package

00:01:15

passed #369516
librem5
lintian-pureos-byzantium-package

00:00:43