docs: add nim requirements

Author: JTorreG

site/content/usage-reporting.md

@@ -24,6 +24,7 @@ To use Usage Reporting, you must have access to NGINX Instance Manager. For more
 To deploy Usage Reporting, you must have the following:
 
 - [NGINX Ingress Controller 3.2.0](https://docs.nginx.com/nginx-ingress-controller) or later
+- [NGINX Instance Manager 2.11.0](https://docs.nginx.com/nginx-instance-manager) or later
 
 In addition to the software requirements, you will need: