AAP-32998: Adds links about OAuth application migration to the Upgrad…

…e/Migration guide (#2374)

* adds links to KB article and relevant documentation

* corrected formatting

downstream/modules/platform/proc-account-linking.adoc

@@ -13,7 +13,7 @@ To address this problem, use the account linking procedure to authenticate from
 
 [IMPORTANT]
 ====
-{ControllerNameStart} OAuth applications on the platform UI are not supported for 2.4 to 2.5 migration.
+{ControllerNameStart} OAuth applications on the platform UI are not supported for 2.4 to 2.5 migration. See this link:https://access.redhat.com/solutions/7091987[Knowledgebase article] for more information. To learn how to recreate your OAuth applications, see link:{URLCentralAuth}/gw-token-based-authentication#assembly-controller-applications[Applications] in the {TitleCentralAuth} guide.
 ====
 
 .Prerequisites