Merge pull request kubernetes#3295 from johnzheng1975/patch-1

Update README.md

Author: k8s-ci-robot

cluster-autoscaler/README.md

@@ -4,7 +4,7 @@
 
 Cluster Autoscaler is a tool that automatically adjusts the size of the Kubernetes cluster when one of the following conditions is true:
 * there are pods that failed to run in the cluster due to insufficient
-  resources,
+  resources.
 * there are nodes in the cluster that have been underutilized for an extended period of time and their pods can be placed on other existing nodes.
 
 # FAQ/Documentation