Fix wording in README.md

Author: bryk

README.md

@@ -2,7 +2,7 @@
 [![Build Status](https://travis-ci.org/kubernetes/dashboard.svg?branch=master)](https://travis-ci.org/kubernetes/dashboard)
 
 Kubernetes Dashboard is a general purpose, web-based UI for Kubernetes clusters. It allows users to
-manage applications running in the cluster, troubleshoot them, as well as manage the cluster
+manage applications running in the cluster and troubleshoot them, as well as manage the cluster
 itself.
 
 ## Usage