docs: update helm-controller doc

docs/components/helm/controller.md

@@ -6,18 +6,20 @@ releases with Kubernetes manifests.
 ![](../../_files/helm-controller.png)
 
 The desired state of a Helm release is described through a Kubernetes Custom Resource named `HelmRelease`.
-Based on the creation, mutation or removal of a HelmRelease resource in the cluster,
+Based on the creation, mutation or removal of a `HelmRelease` resource in the cluster,
 Helm actions are performed by the controller.
 
 Features:
 
 - Watches for `HelmRelease` objects and generates `HelmChart` objects
+- Supports `HelmChart` artifacts produced from `HelmRepository` and `GitRepository` sources
 - Fetches artifacts produced by [source-controller](../source/controller.md) from `HelmChart` objects
-- Watches `HelmChart` objects for revision changes (semver ranges)
-- Performs Helm v3 actions including Helm tests as configured in the `HelmRelease` objects
-- Runs Helm install/upgrade in a specific order, taking into account the depends-on relationship
+- Watches `HelmChart` objects for revision changes (including semver ranges for charts from `HelmRepository` sources)
+- Performs automated Helm actions, including Helm tests, rollbacks and uninstalls
+- Offers extensive configuration options for automated remediation (rollback, uninstall, retry) on failed Helm install, upgrade or test actions
+- Runs Helm install/upgrade in a specific order, taking into account the depends-on relationship defined in a set of `HelmRelease` objects
 - Prunes Helm releases removed from cluster (garbage collection) 
-- Reports Helm releases status (alerting provided by [notification-controller](../notification/controller.md))
+- Reports Helm releases statuses (alerting provided by [notification-controller](../notification/controller.md))
 
 Links: