Use a different image for Debian Bookworm testing

Now that geerlingguy/docker-debian12-ansible is available we can switch
to it instead of using ours.

Author: mcdonnnj

molecule/default/molecule.yml

@@ -33,7 +33,7 @@ platforms:
       - /sys/fs/cgroup:/sys/fs/cgroup:rw
   - cgroupns_mode: host
     command: /lib/systemd/systemd
-    image: docker.io/cisagov/docker-debian12-ansible:latest
+    image: docker.io/geerlingguy/docker-debian12-ansible:latest
     name: debian12-systemd
     platform: amd64
     pre_build_image: true