Need help in installing grafana plugin in Azure kubernetes pod

I have gone inside the grafana pod deployed in azure Kubernetes and executed the below command

It states that it is successfully installed the plugin. but also told to restart the server(not sure how to restart the grafana after installing). If I restart the deployment (grafana pod ) then all the manually installed plugin has vanished.

But after this when I checked in a browser by reloading the page, i didn’t see pie chart plugin added.

Please help me to install pie chart plugin