Update waf-application-gateway-for-containers-overview.md

only supports DRS 2.1 at this time.

Author: Miskatonic-Electronic

articles/web-application-firewall/ag/waf-application-gateway-for-containers-overview.md

@@ -137,7 +137,7 @@ spec:
 The following functionality isn't supported on a WAF policy that's associated with an Application Gateway for Containers instance:
 
 - **Cross-region, cross-subscription policy**: Your WAF policy must be in the same subscription and region as your Application Gateway for Containers resource.
-- **Core Rule Set (CRS) managed rules**: An Application Gateway for Containers WAF supports only Default Rule Set (DRS) managed rule sets.
+- **Core Rule Set (CRS) managed rules**: An Application Gateway for Containers WAF supports only Default Rule Set (DRS) 2.1 managed rule set.
 - **Legacy Bot Manager Rule Set**: Bot Manager Ruleset 0.1 isn't supported, but Bot Manager Ruleset versions 1.0 and 1.1 are supported.
 - **JavaScript challenge actions on Bot Manager rules**: You can't set the action on a Bot Manager rule to JavaScript challenge.
 - **Captcha challenge actions on Bot Manager rules**: You can't set the action on a Bot Manager rule to Captcha.