Update RN texts

Author: GitHub Actions

modules/release-notes/ref-release-notes-deprecated-functionalities.adoc

@@ -22,5 +22,11 @@ With this update, you can evaluate your platform's log forwarding solutions to a
 .Additional resources
 * link:https://issues.redhat.com/browse/RHIDP-4913[RHIDP-4913]
 
+[id="deprecated-functionality-rhidp-5218"]
+== {rhsso-brand-name} `7.6` is deprecated as an authentication provider
 
+{rhsso-brand-name} ({rhsso}) `7.6` is deprecated as an authentication provider. You can continue to use {rhsso} until the end of maintenance support. For details, see link:https://access.redhat.com/support/policy/updates/jboss_notes/#p_sso[RHSSO lifecycle dates]. As an alternative, migrate to {rhbk-brand-name} `v24`.
 
+
+.Additional resources
+* link:https://issues.redhat.com/browse/RHIDP-5218[RHIDP-5218]

modules/release-notes/ref-release-notes-technology-preview.adoc

@@ -80,14 +80,12 @@ The following tables list products and their versions compatible with {product-s
 | `@backstage/backend-app-api`
 | 1.0.1
 
-
 | `@backstage/backend-defaults`
 | 0.5.2
 
 | `@backstage/backend-dynamic-feature-service`
 | 0.4.4
 
-
 | `@backstage/backend-plugin-api`
 | 1.0.1
 
@@ -107,5 +105,5 @@ The following tables list products and their versions compatible with {product-s
 .Additional resources
 * link:https://issues.redhat.com/browse/RHIDP-5070[RHIDP-5070]
 
-
-
+== Added notification backend plugins
+With this update, {product-short} includes the `@backstage/plugin-notification-backend` plugins to manage and streamline notification delivery.