Revise ExpressRoute circuits bandwidth support

Updated bandwidth support range for ExpressRoute Traffic Collector to address 400G ER Direct

Author: jeff-lovette

articles/expressroute/traffic-collector.md

@@ -48,7 +48,9 @@ For more information, see [ExpressRoute limits](../azure-resource-manager/manage
 
 ## Supported ExpressRoute circuits
 
-ExpressRoute Traffic Collector supports both Provider-managed circuits and ExpressRoute Direct circuits. Currently, it only supports circuits with a bandwidth of 1Gbps or greater.
+ExpressRoute Traffic Collector supports both Provider-managed Circuits and ExpressRoute Direct Circuits. Currently, it supports Circuits with a bandwidth between 1Gbps and 100Gbps. 
+
+200Gbps and 400Gbps ExpressRoute Direct Circuits are not supported.
 
 ## Flow log schema