Couldn't find the image renderer plugin

I was first using Grafana 6.6.2, and alerts with images were working with out any extra plugin installation…

Now when I changed to 7.0.0 I see a message for activating the Grafana Image renderer plugin and I couldnt find a possible way to install it yet. I tried plugins: - grafana-image-render in the values.yaml file, but no luck

I am using a HELM based deployment