[krb5-auth-dialog] ci: Switch Debian build to bookworm

[Guido Günther <guidog src gnome org>]

commit 29f12a330a9e0bf7aaebd9865ec051a4281f6e87
Author: Guido Günther <agx sigxcpu org>
Date:   Thu Oct 13 11:56:31 2022 +0200

    ci: Switch Debian build to bookworm
    
    We want to use a newer meson

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index aae774d..02b960f 100755
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -18,7 +18,7 @@ variables:
       yelp-tools
 
 build-debian:
-  image: debian:bullseye
+  image: debian:bookworm
   stage: build
   before_script:
     - apt-get update