Update RN texts

Author: GitHub Actions

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

@@ -106,4 +106,4 @@ The following tables list products and their versions compatible with {product-s
 * 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.
+With this update, {product-short} includes the Signals (frontend), Notifications (backend), Notifications (frontend), and Notifications Module Email plugins to manage and streamline notification delivery.