Fix typo

Signed-off-by: Jon Huhn <huhnjon@gmail.com>

pkg/kube/client.go

@@ -174,7 +174,7 @@ func (c *Client) Build(reader io.Reader, validate bool) (ResourceList, error) {
 }
 
 // Update takes the current list of objects and target list of objects and
-// creates resources that don't already exists, updates resources that have been
+// creates resources that don't already exist, updates resources that have been
 // modified in the target configuration, and deletes resources from the current
 // configuration that are not present in the target configuration. If an error
 // occurs, a Result will still be returned with the error, containing all