Update rules/integrations/aws/privilege_escalation_role_assumption_by_service.toml

Author: imays11

rules/integrations/aws/privilege_escalation_role_assumption_by_service.toml

@@ -27,7 +27,7 @@ license = "Elastic License v2"
 name = "AWS STS Role Assumption by Service"
 note = """## Triage and Analysis
 
-### Investigating AWS STS Role Assumption for Service
+### Investigating AWS STS Role Assumption by Service
 
 This rule identifies instances where AWS STS (Security Token Service) is used to assume a role, granting temporary credentials for AWS resource access. While this action is often legitimate, it can be exploited by adversaries to obtain unauthorized access, escalate privileges, or move laterally within an AWS environment.