Additional resources section needed to link to content referenced in "see"

Such as: "For more information, see "Scoping the service mesh with DiscoverySelectors". https://content-stage.docs.redhat.com/en/documentation/red_hat_openshift_service_mesh/3.0/html-single/migrating_from_service_mesh_2_to_service_mesh_3/index#ossm-cluster-wide-migration-discovery-selectors_ossm-migrating-cluster-wide-assembly 

" Do not use this label in network policies. For more information, see "Migration of Network Policies" and "For more information, see "Network Policy migration"." https://content-stage.docs.redhat.com/en/documentation/red_hat_openshift_service_mesh/3.0/html-single/migrating_from_service_mesh_2_to_service_mesh_3/index#ossm-cluster-wide-migration-network-policies_ossm-migrating-cluster-wide-assembly

"For more information, see "Installing the Sidecar". https://content-stage.docs.redhat.com/en/documentation/red_hat_openshift_service_mesh/3.0/html-single/migrating_from_service_mesh_2_to_service_mesh_3/index#ossm-cluster-wide-migration-sidecar-injection_ossm-migrating-cluster-wide-assembly

Check cluster-wide migration guide for more xrefs to add to "Additional resources".