Update node-problem-detector.md

Minor wording clarification

Author: julia-yin

articles/aks/node-problem-detector.md

@@ -10,7 +10,7 @@ ms.date: 05/31/2023
 [Node Problem Detector (NPD)](https://github.com/kubernetes/node-problem-detector) is an open source Kubernetes component that detects node-related problems and reports on them. It runs as a systemd serviced on each node in the cluster and collects various metrics and system information, such as CPU usage, disk usage, and network connectivity. When it detects a problem, it generates *events and/or node conditions*. Azure Kubernetes Service (AKS) uses NPD to monitor and manage nodes in a Kubernetes cluster running on the Azure cloud platform. The AKS Linux extension enables NPD by default.
 
 > [!NOTE]
-> Upgrades to NPD is independent of the node and Kubernetes version upgrade process. If a nodepool is unhealthy (i.e. in a failed state), new NPD versions will not be installed.
+> Upgrades to NPD is independent of the node image and Kubernetes version upgrade processes. If a nodepool is unhealthy (i.e. in a failed state), new NPD versions will not be installed.
 
 ## Node conditions