DOC-2578: Add new entry for Image Optimizer new plugin announcment.

Author: kemister85

modules/ROOT/nav.adoc

@@ -411,6 +411,7 @@
 ** xref:release-notes.adoc[Release notes for {productname}]
 *** {productname} 7.6.0
 **** xref:7.6.0-release-notes.adoc#overview[Overview]
+**** xref:7.6.0-release-notes.adoc#new-premium-plugin[New Premium plugin]
 **** xref:7.6.0-release-notes.adoc#accompanying-premium-plugin-changes[Accompanying Premium plugin changes]
 **** xref:7.6.0-release-notes.adoc#accompanying-enhanced-skins-and-icon-packs-changes[Accompanying Enhanced Skins & Icon Packs changes]
 **** xref:7.6.0-release-notes.adoc#improvements[Improvements]

modules/ROOT/pages/7.6.0-release-notes.adoc

@@ -22,6 +22,19 @@ include::partial$misc/admon-releasenotes-for-stable.adoc[]
 * xref:known-issues[Known issues]
 
 
+[[new-premium-plugin]]
+New Premium plugin
+
+The following new Premium plugin was released alongside {productname} {release-version}.
+
+=== Image Optimizer (Powered by Uploadcare)
+
+{productname} {release-version} introduces the **Image Optimizer (Powered by Uploadcare)** plugin.
+
+The **Image Optimizer** plugin leverages a suite of powerful features for hosting, serving and edit images like responsive image delivery, automatic image file format selection, automatic compression and non-destructive image transformations and adjustments, all powered by link:https://uploadcare.com[Uploadcare].
+
+For information on the **Image Optimizer (Powered by Uploadcare)** plugin, see xref:uploadcare.adoc[Image Optimizer (Powered by Uploadcare)].
+
 [[accompanying-premium-plugin-changes]]
 == Accompanying Premium plugin changes