Update Cleate a local network gateway

If BGP is enabled, the local network gateway does not need to be configured with an address space.

Also, the BGP Peer IP should also be 10.51.255.254, which is the on-premises BGP Peer IP, not the one you wrote down in step 2.

Author: atusi0628

articles/vpn-gateway/bgp-howto.md

@@ -129,13 +129,13 @@ Configure a local network gateway with BGP settings.
 
    * Name: Site5
    * IP address: The IP address of the gateway endpoint you want to connect to. Example: 128.9.9.9
-   * Address spaces: the address spaces on the on-premises site to which you want to route.
+   * Address spaces: If BGP is enabled, no address space is required.
 
 1. To configure BGP settings, go to the **Advanced** page. Use the following example values (shown in Diagram 3). Modify any values necessary to match your environment.
 
    * Configure BGP settings: Yes
    * Autonomous system number (ASN): 65050
-   * BGP peer IP address: The address that you noted in previous steps.
+   * BGP peer IP address: The address of the on-premise VPN Device. Example: 10.51.255.254
 
 1. Click **Review + create** to create the local network gateway.
 
@@ -197,4 +197,4 @@ For context, referring to **Diagram 4**, if BGP were to be disabled between Test
 
 ## Next steps
 
-For more information about BGP, see [About BGP and VPN Gateway](vpn-gateway-bgp-overview.md).
+For more information about BGP, see [About BGP and VPN Gateway](vpn-gateway-bgp-overview.md).