Rename rke-add-ons upgrade doc, add helm upgrade procedure

content/rancher/v2.x/en/upgrades/upgrades/_index.md

@@ -4,8 +4,15 @@ weight: 1005
 ---
 This section contains information about how to upgrade your Rancher server to a newer version.
 
+### Single Node Install
+
 - [Upgrading a Single Node Install]({{< baseurl >}}/rancher/v2.x/en/upgrades/upgrades/single-node-upgrade/)
 - [Upgrading an Air Gapped Single Node Install]({{< baseurl >}}/rancher/v2.x/en/upgrades/upgrades/single-node-air-gap-upgrade/)
+
+### HA Install with Helm Chart
 - [Upgrading a High Availability Install]({{< baseurl >}}/rancher/v2.x/en/upgrades/upgrades/ha-server-upgrade-helm/)
+
+### HA Install with RKE Add-On yaml
+
 - [Migrating from a High Availability RKE Add-on Install]({{< baseurl >}}/rancher/v2.x/en/upgrades/upgrades/migrating-from-rke-add-on/)
 - [Upgrading a High Availability Install - RKE Add-On Install]({{< baseurl >}}/rancher/v2.x/en/upgrades/upgrades/ha-server-upgrade/)

content/rancher/v2.x/en/upgrades/upgrades/ha-server-upgrade/_index.md

@@ -4,7 +4,11 @@ weight: 1040
 aliases:
   - /rancher/v2.x/en/upgrades/ha-server-upgrade/
 ---
-To upgrade Rancher 2.x running in a high availability configuration, run an upgrade command that points to your upgrade config file.
+
+This document is for upgrading Rancher HA installed with the RKE Add-On yaml. See these docs to migrate to or upgrade Rancher installed with the Helm chart.
+
+* [Migrating from a High Availability RKE Add-on Install]({{< baseurl >}}/rancher/v2.x/en/upgrades/upgrades/migrating-from-rke-add-on/)
+* [High Availability (HA) Upgrade]({{< baseurl >}}/rancher/v2.x/en/upgrades/upgrades/ha-server-upgrade-helm/)
 
 >**Prerequisites:**
 {{< requirements_rollback >}}