fix: broken link fixed in Nplus install docker guide (#701)

Fixes a broken link caused by a recent change in the NGINX One console docs

Author: JTorreG

content/nginx/admin-guide/installing-nginx/installing-nginx-docker.md

@@ -221,7 +221,7 @@ sudo docker run \
 ```
 
 To start the Docker container with NGINX Plus and NGINX Agent,
-you will need to additionally pass the NGINX One data plane key as the `NGINX_AGENT_SERVER_TOKEN` environment variable. For more information, see [Create and manage data plane keys](https://docs.nginx.com/nginx-one/how-to/data-plane-keys/create-manage-data-plane-keys/):
+you will need to additionally pass the NGINX One data plane key as the `NGINX_AGENT_SERVER_TOKEN` environment variable. For more information, see [Create and manage data plane keys]({{< ref "/nginx-one/connect-instances/create-manage-data-plane-keys.md" >}}):
 
 ```sh
 sudo docker run \