TMP: workaround missing RL 9.7 container imagetag

Watch https://quay.io/repository/rockylinux/rockylinux?tab=history for it...

Author: elelaysh

etc/kayobe/kolla/kolla-build.conf

@@ -7,7 +7,7 @@ base_tag = noble-20241118.1
 apt_preferences = {{ lookup('env', 'KAYOBE_CONFIG_PATH') }}/environments/ci-builder/builder-apt-preferences
 {# Similarly pinning to Rocky 9 minor version used in our repos #}
 {% elif kolla_base_distro == 'rocky' %}
-base_tag = 9.{{ stackhpc_pulp_repo_rocky_9_minor_version }}
+base_tag = 9
 # NOTE(Alex-Welsh): rpm_setup_config is intentionally left blank to override defaults
 rpm_setup_config = 
 {% endif %}