Document that deleteLocalData defaults to true, not false (#350)

Fixes #349

Author: gabegorelick

config/helm/aws-node-termination-handler/README.md

@@ -54,7 +54,7 @@ The configuration in this table applies to both queue-processor mode and IMDS mo
 
 Parameter | Description | Default
 --- | --- | ---
-`deleteLocalData` | Tells kubectl to continue even if there are pods using emptyDir (local data that will be deleted when the node is drained). | `false`
+`deleteLocalData` | Tells kubectl to continue even if there are pods using emptyDir (local data that will be deleted when the node is drained). | `true`
 `gracePeriod` | (DEPRECATED: Renamed to podTerminationGracePeriod) The time in seconds given to each pod to terminate gracefully. If negative, the default value specified in the pod will be used. | `30`
 `podTerminationGracePeriod` | The time in seconds given to each pod to terminate gracefully. If negative, the default value specified in the pod will be used. | `30`
 `nodeTerminationGracePeriod` | Period of time in seconds given to each NODE to terminate gracefully. Node draining will be scheduled based on this value to optimize the amount of compute time, but still safely drain the node before an event. | `120`