OSDOCS-2461: Added OCM book to ROSA

Author: EricPonvelle

_topic_maps/_topic_map_rosa.yml

@@ -52,7 +52,7 @@ Topics:
 Name: Getting started
 Dir: rosa_getting_started
 Distros: openshift-rosa
-Topics: 
+Topics:
 - Name: Getting started with ROSA
   File: rosa-getting-started
 ---
@@ -88,6 +88,13 @@ Topics:
 - Name: Deleting a ROSA cluster
   File: rosa-sts-deleting-cluster
 ---
+Name: Red Hat OpenShift Cluster Manager
+Dir: ocm
+Distros: openshift-rosa
+Topics:
+- Name: Red Hat OpenShift Cluster Manager
+  File: ocm-overview
+---
 Name: Setting up accounts and clusters
 Dir: rosa_getting_started
 Distros: openshift-rosa