Trigger HelmRelease update when values change

Would like to auto trigger a HelmReleaes update on packages when the contents of the values files passed to the HelmRelease are changed.

Similiar to how charts attach annotations to pods with the sha of the ConfigMap/Secret to force a pod restart when configs change, we could also attach something to the HelmReleaess with the sha of the values to trigger an upgrade as soon as values are updated.