remove word in note

Author: duongau

articles/frontdoor/origin.md

@@ -16,7 +16,7 @@ zone_pivot_groups: front-door-tiers
 ::: zone pivot="front-door-classic"
 
 > [!NOTE]
-> An *Origin* and a *origin group* in this article refers to the backend and backend pool of the Azure Front Door (classic) configuration.
+> *Origin* and *origin group* in this article refers to the backend and backend pool of the Azure Front Door (classic) configuration.
 >
 
 ::: zone-end
@@ -120,4 +120,4 @@ For more information, see [Least latency based routing method](routing-methods.m
 - Learn how to [create an Azure Front Door (classic) profile](quickstart-create-front-door.md).
 - Learn about [Azure Front Door (classic) routing architecture](front-door-routing-architecture.md?pivots=front-door-classic).
 
-::: zone-end
+::: zone-end