Apply suggestions from code review

Co-authored-by: ldecarvalho-doc <[email protected]>

Author: RoRoJ

pages/use-cases/security/security-baseline.mdx

@@ -148,7 +148,7 @@ Find out more:
 - Use Public Gateways or Load Balancers for controlled internet access within a Private Network.
 
 **Implement Security Groups**
-- Use security groups as as virtual firewalls for your Instances.
+- Use security groups as virtual firewalls for your Instances.
 - Customize their rules to allow only required traffic; avoid default permissive settings.
 
 **Leverage Edge Services WAF**