Update application-gateway-waf-metrics.md

Author: tobystic

articles/web-application-firewall/ag/application-gateway-waf-metrics.md

@@ -27,7 +27,7 @@ WAF with Application Gateway provides detailed reporting on each threat it detec
 For additional information on diagnostics log, visit [Application Gateway WAF resource logs](../ag/web-application-firewall-logs.md) 
 
 
-## Application Gateway WAF V2 Metrics  
+## Application Gateway WAF v2 Metrics  
 
 New WAF metrics are only available for Core Rule Set 3.2 or greater, or with bot protection and geo-filtering. The metrics can be further filtered on the supported dimensions