Update flag description

gke-disk-image-builder/cli/main.go

@@ -44,7 +44,7 @@ func main() {
 	gcsPath := flag.String("gcs-path", "", "gcs location to dump the logs")
 	machineType := flag.String("machine-type", "n2-standard-16", "GCE instance machine type to generate the disk image")
 	diskType := flag.String("disk-type", "pd-ssd", "disk type to generate the disk image")
-	diskSizeGb := flag.Int64("disk-size-gb", 60, "disk size to prepare unpack container images")
+	diskSizeGb := flag.Int64("disk-size-gb", 60, "disk size to unpack container images")
 	gcpOAuth := flag.String("gcp-oauth", "", "path to GCP service account credential file")
 	imagePullAuth := flag.String("image-pull-auth", "None", "auth mechanism to pull the container image, valid values: [None, ServiceAccountToken].\nNone means that the images are publically available and no authentication is required to pull them.\nServiceAccountToken means the service account oauth token will be used to pull the images.\nFor more information refer to https://cloud.google.com/compute/docs/access/authenticate-workloads#applications")
 	timeout := flag.String("timeout", "20m", "Default timout for each step, defaults to 20m")