docs: Update blocked ports list for NGINXaaS Azure listen directive (#833)

* docs: update blocked ports list for NGINXaaS Azure listen directive and remove port usage details.

Author: rnandwal-f5

content/nginxaas-azure/getting-started/nginx-configuration/overview.md

@@ -74,7 +74,9 @@ Some directives cannot be overridden by the user provided configuration.
 
 ## NGINX listen port restrictions
 
-- Due to port restrictions on Azure Load Balancer health probes, ports `19`, `21`, `70`, and `119` are not allowed. The NGINXaaS deployment can listen on all other ports.
+- Due to port restrictions on Azure Load Balancer health probes, certain ports are not allowed for the `listen` directive in NGINX configuration. The following ports are blocked:
+  - `19`, `21`, `70`, `119` - Azure health probe restricted ports
+  - `49151`, `49153`, `5140`, `50000`, `54141`, `54779` - reserved ports to support other NGINXaaS features
 
 - The [Basic]({{< ref "/nginxaas-azure/billing/overview.md#basic-plan" >}}) plan (and the deprecated Standard (v1) plan) supports a maximum of 5 listen ports in the NGINX configuration. Configurations that specify over 5 unique ports are rejected.