Add helm-monitor plugin

Author: Etienne Tremel

docs/related.md

@@ -38,6 +38,7 @@ or [pull request](https://github.com/kubernetes/helm/pulls).
 - [helm-edit](https://github.com/mstrzele/helm-edit) - Plugin for editing release's values
 - [helm-gcs](https://github.com/nouney/helm-gcs) - Plugin to manage repositories on Google Cloud Storage
 - [helm-github](https://github.com/sagansystems/helm-github) - Plugin to install Helm Charts from Github repositories
+- [helm-monitor](https://github.com/ContainerSolutions/helm-monitor) - Plugin to monitor a release and rollback based on Prometheus/ElasticSearch query
 
 We also encourage GitHub authors to use the [helm-plugin](https://github.com/search?q=topic%3Ahelm-plugin&type=Repositories)
 tag on their plugin repositories.