title: How to install grafana plugins?
body: <p>I have installed grafana using helm chart.I wanted to add pie chart plugin.So
  installed grafana plugin with command <code>kubectl exec -it kube-prometheus-stack-chart-grafana-9dc44fc4b-ndbpt -n syg-monitoring -c grafana grafana-cli plugins install grafana-piechart-panel</code>
  so its installed.</p>
  <pre><code>installed from: https://grafana.com/api/plugins/grafana-piechart-panel/versions/1.6.1/download
  into: /var/lib/grafana/plugins
  
  ✔ Installed grafana-piechart-panel successfully 
  </code></pre>
  <p>But whenever i visit my dashboard, unable to see plugin. Is there any addintional things to done ? please guide. any help will be appreciated.</p>