Update articles/api-management/api-management-gateways-overview.md

Author: tomkerkhove

articles/api-management/api-management-gateways-overview.md

@@ -44,7 +44,7 @@ API Management offers both managed and self-hosted gateways:
 
     * Each self-hosted gateway is associated with a **Gateway** resource in a cloud-based API Management instance from which it receives configuration updates and communicates status. 
 
-[!INCLUDE [preview](./includes/preview/preview-callout-self-hosted-gateway-deprecation.md.md)]
+[!INCLUDE [preview](./includes/preview/preview-callout-self-hosted-gateway-deprecation.md)]
 
 ## Feature comparison: Managed versus self-hosted gateways