(automated) Bump kolla to stackhpc/18.8.0.4

Author: stackhpc-ci

etc/kayobe/stackhpc.yml

@@ -172,7 +172,7 @@ stackhpc_repo_elrepo_9_version: "{{ stackhpc_repo_distribution }}"
 
 # Kolla source repository.
 stackhpc_kolla_source_url: "https://github.com/stackhpc/kolla"
-stackhpc_kolla_source_version: stackhpc/18.8.0.3
+stackhpc_kolla_source_version: stackhpc/18.8.0.4
 
 # Kolla Ansible source repository.
 stackhpc_kolla_ansible_source_url: "https://github.com/stackhpc/kolla-ansible"