Fix typo

Author: johndowns

articles/web-application-firewall/afds/waf-front-door-drs.md

@@ -44,7 +44,7 @@ The Microsoft Threat Intelligence Collection rules are written in partnership wi
 
 When you use DRS 2.0 or later, your WAF uses *anomaly scoring*. Traffic that matches any rule isn't immediately blocked, even when your WAF is in prevention mode. Instead, the OWASP rule sets define a severity for each rule: *Critical*, *Error*, *Warning*, or *Notice*. The severity affects a numeric value for the request, which is called the *anomaly score*:
 
-| Rule severity | Values contributes to anomaly score |
+| Rule severity | Value contributed to anomaly score |
 |-|-|
 | Critical | 5 |
 | Error | 4 |