tasks/userns: Don't use a debug container

Signed-off-by: Rodrigo Campos <rodrigoca@microsoft.com>

Author: rata

content/en/docs/tasks/configure-pod-container/user-namespaces.md

@@ -72,10 +72,10 @@ to `false`. For example:
    kubectl apply -f https://k8s.io/examples/pods/user-namespaces-stateless.yaml
    ```
 
-1. Add a debugging container and attach to it and run `readlink /proc/self/ns/user`:
+1. Exec into the pod and run `readlink /proc/self/ns/user`:
 
    ```shell
-   kubectl debug userns -it --image=busybox
+   kubectl exec -ti userns -- bash
    ```
 
 Run this command: