Merge pull request #181 from johannesfrey/platform-upgrade-loft-cli

Mention only vcluster CLI is supported for platform upgrade

platform/manage/upgrade-platform.mdx

@@ -23,6 +23,11 @@ to use when upgrading your vCluster Platform deployment.
 Before attempting to perform this major upgrade please ensure that you have upgraded to the latest v3 release first. E.g. by running the steps above.
 :::
 
+:::warning Only vCluster CLI is supported
+If you choose to upgrade vCluster Platform via the CLI it is required to use the `vcluster` CLI and not the `loft` CLI. For further information
+please see the [Loft CLI to vCluster CLI Migration section](/vcluster/reference/migrations/loft-cli-vcluster-cli-migration/).
+:::
+
 With v4.0 the project namespace prefix can now be configured and the default has been changed from `loft-p` (which is used by v3) to `p-`.
 In order for the upgrade from v3 to v4 to succeed you must set this explicitly regardless of updating via the vCluster CLI or via Helm.