Update content/en/docs/reference/node/kubelet-files.md

Co-authored-by: Qiming Teng <[email protected]>

content/en/docs/reference/node/kubelet-files.md

@@ -49,7 +49,7 @@ Location can be configured using the `staticPodPath` kubelet configuration optio
 
 #### Checkpoint files
 
-CPU and Memory managers are using state files to keep the mapping between
+CPU managers and memory managers use state files to keep the mapping between
 Pods and allocated resources. Files are named `memory_manager_state`
 and `cpu_manager_state` and both located in kubelet's root directory,
 typically `/var/lib/kubelet`. Kubelet root directory can be configured