RHDHBUGS-2192: Add note in the upgrade instructions highlighting limitation when upgrading CLI-deployed Helm releases (#1595)

* Add note in the upgrade instructions highlighting limitation when upgrading CLI-deployed Helm releases

* Apply Armel's suggestion

* Apply new suggestion

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Co-authored-by: GitHub Actions <[email protected]>

Author: jmagak

modules/upgrade/proc-upgrade-rhdh-helm.adoc

@@ -6,6 +6,12 @@
 You can upgrade to a later version of {product} in {ocp-short} by using either the web console or the CLI.
 
 * {ocp-short} web console
++
+[WARNING]
+====
+If you have installed {product-short} manually using the Helm CLI, the Helm chart release upgrade in the OpenShift Developer Console is going to fail. The failure is due to the limitations when using the {ocp-short} console to upgrade a Helm release that was initially deployed using the Helm CLI. You can bypass this limitation by using the Helm CLI to upgrade.
+However, if you still want to upgrade using the console, select the Helm Chart version from the drop-down list and select the {product-short} version you want to upgrade to. Before performing this step, save your `values.yaml` configuration file in a different location.
+====
 
 . In the *Developer* perspective, click *Helm* to open the *Helm Releases* tab.