Added the table for clusters and methods for upgrade (#859)

Signed-off-by: Ranjini M N <[email protected]>

Author: ranjinimn

asciidoc/day2/migration.adoc

@@ -18,6 +18,23 @@ This section offers migration guidelines for existing `Edge 3.0` (including mino
 
 For a list of `Edge 3.1.0` component versions, refer to the <<release-notes, release notes>>.
 
+The following table lists the different types of clusters and the methods to upgrade clusters:
+
+[[Clusters-and-methods-to-upgrade-downstream-clusters]]
+.Clusters and methods to upgrade downstream clusters
+|===
+| Cluster type  | Method
+
+|EIB provisioned clusters
+|See <<day2-migration-mgmt-fleet>> for details.
+
+|Metal^3^ provisioned clusters
+|See <<atip-lifecycle-downstream, Downstream cluster upgrades>> for details.
+
+|Phone-home provisioned clusters
+|See https://ranchermanager.docs.rancher.com/{rancher-docs-version}/getting-started/installation-and-upgrade/upgrade-and-roll-back-kubernetes#upgrading-the-kubernetes-version[Upgrading the Kubernetes Version] for Kubernetes version upgrade and <<day2-downstream-clusters, Downstream clusters>> for SUC, Operating system, and other components.
+|===
+
 [#day2-migration-mgmt]
 == Management cluster