Update oracle-oci-overview.md

Update on regions.

Author: romitgirdhar

articles/virtual-machines/workloads/oracle/oracle-oci-overview.md

@@ -46,7 +46,7 @@ The following diagram is a high-level overview of the connected solution. For si
 
 ## Preview limitations
 
-* Cross-cloud connectivity in preview is limited to the Azure East US (eastus) region and the OCI Ashburn (us-ashburn-1) region.
+* Cross-cloud connectivity in preview is limited to the Azure East US (eastus) & UK South (uksouth) regions and the OCI Ashburn (US East) & London (UK South) regions. For UK South, please use Availability Domain 1 (AD 1) in OCI when deploying the inter-connect for lower latencies.
 
 ## Networking