add new resiliency card

Author: duongau

articles/expressroute/index.yml

@@ -86,6 +86,19 @@ landingContent:
             url: designing-for-high-availability-with-expressroute.md
           - text: Design for Disaster Recovery with private peering
             url: designing-for-disaster-recovery-with-expressroute-privatepeering.md
+    # Card
+  - title: Resiliency
+    linkLists:
+      - linkListType: how-to-guide
+        links:
+          - text: Create maximum resiliency with ExpressRoute circuits
+            url: expressroute-howto-circuit-portal-resource-manager.md?pivots=expressroute-preview
+          - text: Create maximum resiliency with ExpressRoute gateways
+            url: expressroute-howto-linkvnet-portal-resource-manager.md?pivots=expressroute-preview
+      - linkListType: architecture
+        links:
+          - text: ExpressRoute reliability - Azure Well-Architected Framework
+            url: /azure/well-architected/service-guides/azure-expressroute#reliability
   # Card
   - title: Learn about ExpressRoute architecture
     linkLists: