add custom rules link

Author: patriciasantaana

src/content/changelogs/api-shield.yaml

@@ -8,7 +8,7 @@ entries:
   - publish_date: "2024-10-18"
     title: API Shield fields in Custom Rules
     description: |-
-      Customers can now use API Shield product feature fields in custom rules, referencing features such as [JWT Validation](/api-shield/security/jwt-validation/), [session identifiers](/api-shield/get-started/#session-identifiers), and [Schema Validation](/api-shield/security/schema-validation/).
+      Customers can now use API Shield product feature fields in [custom rules](/waf/custom-rules/), referencing features such as [JWT Validation](/api-shield/security/jwt-validation/), [session identifiers](/api-shield/get-started/#session-identifiers), and [Schema Validation](/api-shield/security/schema-validation/).
 
   - publish_date: "2024-08-28"
     title: Increased capacity for Endpoint Management and Schema Validation