Website install instruction no longer works since 0.4.1

[ChrisHills463]

The page at https://etcd.aenix.io/docs/v0.4/getting-started/ states:-

1. Install etcd-operator:

kubectl apply -f https://github.com/aenix-io/etcd-operator/releases/latest/download/etcd-operator.yaml

However this does not exist:-

error: unable to read URL "https://github.com/aenix-io/etcd-operator/releases/latest/download/etcd-operator.yaml", server reported 404 Not Found, status code=404

I think there are two options, either add the missing etcd-operator.yaml to release v0.4.1 or update the website to link to https://github.com/aenix-io/etcd-operator/releases/download/v0.4.0/etcd-operator.yaml instead.