Update http-response-codes.md

Clarifying V1 SKU behaviour if the backend response time exceeds the time-out value that is configured in the Backend Setting.

Author: MJyot

articles/application-gateway/http-response-codes.md

@@ -131,7 +131,7 @@ HTTP 502 errors can have several root causes, for example:
 - Invalid or improper configuration of custom health probes.
 - Azure Application Gateway's [backend pool isn't configured or empty](application-gateway-troubleshooting-502.md#empty-backendaddresspool).
 - None of the VMs or instances in [virtual machine scale set are healthy](application-gateway-troubleshooting-502.md#unhealthy-instances-in-backendaddresspool).
-- [Request time-out or connectivity issues](application-gateway-troubleshooting-502.md#request-time-out) with user requests.
+- [Request time-out or connectivity issues](application-gateway-troubleshooting-502.md#request-time-out) with user requests-Azure application Gateway V1 SKU sent HTTP 502 errors if the backend response time exceeds the time-out value that is configured in the Backend Setting.
 
 For information about scenarios where 502 errors occur, and how to troubleshoot them, see [Troubleshoot Bad Gateway errors](application-gateway-troubleshooting-502.md).