test: use Debian Bookworm for Vagrant Box and repo source

molecule/resources/playbooks/prepare.yml

@@ -22,7 +22,7 @@
           become: true
         - name: add repo URL to sources.list
           ansible.builtin.apt_repository:
-            repo: "deb https://sdvdebianrepo.slub-dresden.de/deb-repository bullseye main"
+            repo: "deb https://sdvdebianrepo.slub-dresden.de/deb-repository bookworm main"
             state: present
             update_cache: true
             mode: "0644"

molecule/virtualbox/molecule.yml

@@ -9,7 +9,7 @@ platforms:
   # https://github.com/ansible-community/molecule-vagrant#documentation
   # for more platform parameters.
   - name: vm-runner
-    box: debian/bullseye64
+    box: debian/bookworm64
     memory: 1024
     # List of raw Vagrant `config` options.
     # provider_raw_config_args: