d/gbp.conf: Add sign-tags = True under [tag] section

5 jobs for gbp in 15 minutes and 3 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Package
passed #369042
librem5
package-pureos-byzantium

00:04:37

passed #369043
librem5:arm64
package-pureos-byzantium:arm64

00:06:33

 
  Test Package
passed #369044
librem5
autopkgtest-pureos-byzantium-package

00:01:16

passed #369046
librem5
check-tarball

00:01:24

passed #369045
librem5
lintian-pureos-byzantium-package

00:01:10