Typo fix in etcd/README.md (#4199)

* Add version for etcd

Add version for etcd

* Typo fix in etcd/README.md

Typo fix in etcd/README.md

incubator/etcd/Chart.yaml

@@ -1,6 +1,6 @@
 name: etcd
 home: https://github.com/coreos/etcd
-version: 0.3.7
+version: 0.3.8
 description: Distributed reliable key-value store for the most critical data of a
   distributed system.
 icon: https://raw.githubusercontent.com/coreos/etcd/master/logos/etcd-horizontal-color.png

incubator/etcd/README.md

@@ -33,7 +33,7 @@ $ helm install --name my-release incubator/etcd
 
 ## Configuration
 
-The following tables lists the configurable parameters of the etcd chart and their default values.
+The following table lists the configurable parameters of the etcd chart and their default values.
 
 | Parameter               | Description                          | Default                                            |
 | ----------------------- | ------------------------------------ | -------------------------------------------------- |