Bump Grafana tag for Rocky

Author: cityofships

etc/kayobe/kolla/globals.yml

@@ -22,6 +22,7 @@ prometheus_node_exporter_tag: yoga-20230310T173747
 bifrost_tag: yoga-20230310T194732
 blazar_tag: yoga-20230315T130918
 caso_tag: yoga-20230315T130918
+grafana_tag: yoga-20230419T111514
 ironic_tag: yoga-20230316T170311
 ironic_dnsmasq_tag: yoga-20230310T170929
 nova_tag: yoga-20230331T113516