Update + add changes suggested

content/en/docs/tasks/administer-cluster/kubelet-config-file.md

@@ -27,12 +27,12 @@ The configuration file must be a JSON or YAML representation of the parameters
 in this struct. Make sure the Kubelet has read permissions on the file.
 
 Here is an example of what this file might look like:
-```
+```yaml
 apiVersion: kubelet.config.k8s.io/v1beta1
 kind: KubeletConfiguration
-address: "192.168.0.8",
-port: 20250,
-serializeImagePulls: false,
+address: "192.168.0.8"
+port: 20250
+serializeImagePulls: false
 evictionHard:
     memory.available:  "200Mi"
 ```