Update application-gateway-crs-rulegroups-rules.md

Author: Miskatonic-Electronic

articles/web-application-firewall/ag/application-gateway-crs-rulegroups-rules.md

@@ -105,7 +105,7 @@ For example, a single *Critical* rule match is enough for the WAF to block a req
 
 DRS 2.1 rules offer better protection than earlier versions of the DRS. It includes more rules developed by the Microsoft Threat Intelligence team and updates to signatures to reduce false positives. It also supports transformations beyond just URL decoding.
 
-DRS 2.1 includes 17 rule groups, as shown in the following table. Each group contains multiple rules, and you can customize behavior for individual rules, rule groups, or entire rule set.
+DRS 2.1 includes 17 rule groups, as shown in the following table. Each group contains multiple rules, and you can customize behavior for individual rules, rule groups, or entire rule set. DRS 2.1 is baselined off the Open Web Application Security Project (OWASP) Core Rule Set (CRS) 3.3.2 and includes additional proprietary protections rules developed by Microsoft Threat Intelligence team. 
 
 |Rule group|ruleGroupName|Description|
 |---|---|---|