update LS troubleshooting url

Author: siasin

platform/eks/README-NGINX.md

@@ -98,4 +98,4 @@ Otherwise, you can also retrieve the licensing report .zip file by running:
 curl "http://${LICENSING_URL}/snapshot?token=${TOKEN}" --output report.zip
 ```
 
-If your IBM License Service instance is not running properly, refer to this [troubleshooting page](https://www.ibm.com/docs/en/cpfs?topic=software-troubleshooting).
+If your IBM License Service instance is not running properly, refer to this [troubleshooting page](https://www.ibm.com/docs/en/cloud-paks/foundational-services/4.9?topic=service-troubleshooting-license).