Revise WAF ruleset details to version 2.2

Updated WAF ruleset information to reflect the latest version and additional protections.

Author: yuvalpery

articles/web-application-firewall/ag/application-gateway-waf-faq.yml

@@ -44,7 +44,7 @@ sections:
       - question: |
           What rules are currently available for the WAF?
         answer: |
-          The WAF currently supports Default Rule Set (DRS) [2.1](application-gateway-crs-rulegroups-rules.md#drs21), Core Rule Set (CRS) [3.2](application-gateway-crs-rulegroups-rules.md#owasp32), and [3.1](application-gateway-crs-rulegroups-rules.md#owasp31). These rules provide baseline security against most of the top 10 vulnerabilities that Open Web Application Security Project (OWASP) identifies: 
+          The latest and most recommended ruleset version of WAF is the Default Rule Set (DRS) [2.2](application-gateway-crs-rulegroups-rules.md#drs22). In addition to the baseline security against most of the top 10 vulnerabilities that Open Web Application Security Project (OWASP) identifies, DRS 2.2 includes additional proprietary protections rules developed by Microsoft Threat Intelligence team, which expand coverage across SQL injection, XSS, and application-security attack patterns: 
           
           * Protection against SQL injection
           * Protection against cross-site scripting
@@ -56,8 +56,7 @@ sections:
           
           For more information, see the [OWASP top 10 vulnerabilities](https://owasp.org/www-project-top-ten/).
 
-          CRS 2.2.9 and 3.0 are no longer supported for new WAF policies. We recommend that you [upgrade to the latest DRS version](/azure/web-application-firewall/ag/upgrade-ruleset-version). You can't use CRS 2.2.9 along with CRS 3.2/DRS 2.1 and later versions. 
-          
+          You can find more information about older ruleset versions and WAF's managed ruleset support policy [here].(ruleset-support-policy)          
       - question: |
           What content types does the WAF support?
         answer: |