Update functions-proxies.md

Author: anthonychu

articles/azure-functions/functions-proxies.md

@@ -3,7 +3,7 @@ title: Work with proxies in Azure Functions
 description: Overview of how to use Azure Functions Proxies
 
 ms.topic: conceptual
-ms.date: 01/22/2018
+ms.date: 11/08/2021
 
 ---
 # Work with Azure Functions Proxies
@@ -15,6 +15,8 @@ Standard Functions billing applies to proxy executions. For more information, se
 [!INCLUDE [intro](../../includes/functions-bindings-intro.md)]
 
 > [!NOTE] 
+> Proxies is available in Azure Functions 1.0 to 3.0.
+> 
 > You should also consider using [Azure API Management](../api-management/api-management-key-concepts.md) for your application. It provides the same capabilities as Functions Proxies as well as other tools for building and maintaining APIs, such as OpenAPI integration, rate limiting, and advanced policies. 
 
 ## <a name="create"></a>Create a proxy