Change to serverless MDX and image files

Author: joepeeples

docs/serverless/images/es-overview/-getting-started-workflow.png

@@ -10,7 +10,7 @@ status: in review
 <DocBadge template="technical preview" />
 <div id="es-overview"></div>
 
-((elastic-sec)) combines advanced SIEM threat detection features with endpoint
+((elastic-sec)) combines outstanding SIEM threat detection features with endpoint
 prevention and response capabilities in one solution. These analytical and
 protection capabilities, leveraged by the speed and extensibility of
 Elasticsearch, enable analysts to defend their organization from threats before