Update FTL for move to Prod Cluster

Author: Wolfgang Kulhanek

courses/ocp4_advanced_application_deployment/course_vars.yml

@@ -1,4 +1,4 @@
 ---
 update_lrs: false
-nexus_registry_hostname: homework-nexus-registry.apps.shared-dev4.dev4.openshift.opentlc.com
+nexus_registry_hostname: homework-nexus-registry.apps.shared-na46.openshift.opentlc.com
 ...