Fix heading in agent config doc (#5359)

docs/content/tutorials/security-monitoring.md

@@ -14,7 +14,7 @@ This guide assumes that you have an installation of NGINX Instance Manager with
 
 If you use custom container images, NGINX Agent must be installed along with NGINX App Protect WAF. See the [Dockerfile](https://github.com/nginxinc/kubernetes-ingress/tree/v3.5.0/build/Dockerfile) for examples of how to install NGINX Agent or the [NGINX Agent installation documentation](https://docs.nginx.com/nginx-agent/installation-upgrade/) for more information.
 
-## Deploying NGINX Ingress Controller with GlobalConfiguration resource
+## Deploying NGINX Ingress Controller with NGINX Agent configuration 
 
 {{<tabs name="deploy-config-resource">}}