OSDOCS-4496:Instance Types ROSA Additions

Author: jneczypor

modules/rosa-sdpolicy-am-regions-az.adoc

@@ -19,6 +19,7 @@ The following AWS regions are supported by Red Hat OpenShift 4 and are supported
 * ap-southeast-1 (Singapore)
 * ap-southeast-2 (Sydney)
 * ap-southeast-3 (Jakarta, AWS opt-in required)
+* ap-southeast-4 (Melbourne, AWS opt-in required)
 * ca-central-1 (Central Canada)
 * eu-central-1 (Frankfurt)
 * eu-north-1 (Stockholm)

modules/sdpolicy-am-regions-availability-zones.adoc

@@ -15,6 +15,7 @@ The following AWS regions are supported by {OCP} 4 and are supported for {produc
 * ap-southeast-1 (Singapore)
 * ap-southeast-2 (Sydney)
 * ap-southeast-3 (Jakarta, AWS opt-in required)
+* ap-southeast-4 (Melbourne, AWS opt-in required)
 * ca-central-1 (Central Canada)
 * eu-central-1 (Frankfurt)
 * eu-north-1 (Stockholm)