Deploy helm operator in get-started guide

The get started guide uses repo github.com/weaveworks/flux-get-started
which contains HelmRelease manifests, but the guide didn't instruct
the reader to deploy the Helm operator.

site/get-started.md

@@ -70,7 +70,7 @@ add the git URL to the config file above.
 In the next step, deploy Flux to the cluster:
 
 ```sh
-kubectl apply -f deploy
+kubectl apply -f deploy deploy-helm/helm-operator-deployment.yaml deploy-helm/flux-helm-release-crd.yaml
 ```
 
 Allow some time for all containers to get up and running. If you're