add reference link to metro article

Author: duongau

articles/expressroute/design-architecture-for-resiliency.md

@@ -36,7 +36,7 @@ The maximum resiliency architecture in ExpressRoute is structured to eliminate a
 
 ### High resiliency
 
-High resiliency, also referred to as multi-site or site resiliency, enables the use of multiple sites within the same metropolitan (Metro) area to connect your on-premises network through ExpressRoute to Azure. High resiliency offers site diversity by splitting a single circuit across two sites. The first connection is established at one site and the second connection at a different site. The objective of multi-site resiliency is to mitigate the effect of edge-sites isolation and failures by introducing capabilities to enable site diversity. Site diversity is achieved by using a single circuit across paired sites within a metropolitan city, which offers resiliency to failures between edge and region. High resiliency provides a higher level of site resiliency than standard resiliency, but not as much as maximum resiliency. High resiliency is priced the same as standard resiliency, with latency parity across two sites. This architecture can be used for business and mission-critical workloads within a region.
+High resiliency, also referred to as multi-site or site resiliency, enables the use of multiple sites within the same metropolitan (Metro) area to connect your on-premises network through ExpressRoute to Azure. High resiliency offers site diversity by splitting a single circuit across two sites. The first connection is established at one site and the second connection at a different site. The objective of multi-site resiliency is to mitigate the effect of edge-sites isolation and failures by introducing capabilities to enable site diversity. Site diversity is achieved by using a single circuit across paired sites within a metropolitan city, which offers resiliency to failures between edge and region. High resiliency provides a higher level of site resiliency than standard resiliency, but not as much as maximum resiliency. High resiliency is priced the same as standard resiliency, with latency parity across two sites. This architecture can be used for business and mission-critical workloads within a region. For more information, see [ExpressRoute Metro](metro.md)
 
 :::image type="content" source="./media/design-architecture-for-resiliency/high-resiliency.png" alt-text="Diagram illustrating a single ExpressRoute circuit, with each link configured at two distinct peering locations.":::