Update configuration.md (ip-groups)

add IP Groups in features table

Author: kudriavitsky

content/nap-waf/v4/configuration-guide/configuration.md

@@ -39,6 +39,7 @@ When configuring NGINX App Protect WAF, `app_protect_enable` should always be en
 |[XFF headers & trust](#xff-headers-and-trust) | Disabled by default. User can enable it and optionally add a list of custom XFF headers. |
 |[gRPC Protection](#grpc-protection-for-unary-traffic) | gRPC content profile detects malformed content, parses well-formed content, and extracts the text fields for detecting attack signatures and disallowed meta-characters. In addition, it enforces size restrictions and prohibition of unknown fields. The Interface Definition Language (IDL) files for the gRPC API must be attached to the profile. gRPC protection can be on [unary](#grpc-protection-for-unary-traffic) or [bidirectional](#grpc-protection-for-bidirectional-streaming) traffic.|
 |[Brute Force Attack Preventions](#brute-force-attack-preventions) | Configure brute-force-attack-preventions parameters to secured areas of a web application from brute force attacks.|}
+|[IP Groups](#ip-address-lists) | Configure IP Groups feature to organize lists of allowed and forbidden IP addresses across several lists with common attributes.|}
 
 ### Disallowed File Types
 {{< include "nap-waf/config/common/disallowed-file-types.md" >}}