fix description about zookeeper

s/achive/achieve

docs/tutorials/stateful-application/zookeeper.md

@@ -502,7 +502,7 @@ As noted in the [Facilitating Leader Election](#facilitating-leader-election) an
 ZooKeeper ensemble require consistent configuration in order to elect a leader 
 and form a quorum. They also require consistent configuration of the Zab protocol
 in order for the protocol to work correctly over a network. In our example we 
-achive consistent configuration by embedding the configuration directly into 
+achieve consistent configuration by embedding the configuration directly into 
 the manifest.
 
 Get the `zk` StatefulSet.