Update rules/integrations/aws/resource_development_sns_topic_created_by_rare_user.toml

Author: terrancedejesus

rules/integrations/aws/resource_development_sns_topic_created_by_rare_user.toml

@@ -25,7 +25,7 @@ license = "Elastic License v2"
 name = "AWS SNS Topic Created by Rare User"
 note = """## Triage and Analysis
 
-### Investigating AWS SNS Topic Created by a Rare User
+### Investigating AWS SNS Topic Created by Rare User
 
 This rule detects the creation of an AWS Simple Notification Service (SNS) topic by a user who does not typically perform this action. Adversaries may create SNS topics to facilitate data exfiltration or other malicious activities.