Update downtime note for ExpressRoute gateway upgrades

Clarified note about expected downtime during gateway upgrades.

Author: MekaylaMoore

articles/expressroute/expressroute-about-virtual-network-gateways.md

@@ -27,8 +27,6 @@ You can upgrade your gateway to a higher-capacity SKU within the same SKU family
 - Upgrade from one availability zone-enabled SKU to another availability zone-enabled SKU
 
 For all other scenarios, including downgrades or switching between availability zone types, you must delete and recreate the gateway. This process incurs downtime.
-> [!NOTE]
-> If the gateway is connected to a Private Link, customers should expect up to 2 hours of downtime during the upgrade.
 
 ## Gateway subnet