DOC-2578: Update changelog.adoc for TinyMCE 7.6.0.

Author: kemister85

modules/ROOT/pages/changelog.adoc

@@ -4,9 +4,45 @@
 
 NOTE: This is the {productname} Community version changelog. For information about the latest {cloudname} or {enterpriseversion} Release, see: xref:release-notes.adoc[{productname} Release Notes].
 
-== xref:7.6.0-release-notes.adoc[7.6.0 - 2024-12-04]
+== xref:7.6.0-release-notes.adoc[7.6.0 - 2024-12-11]
 
-//TODO
+=== Added
+* It is now possible to create labeled groups in context toolbars.
+// #TINY-11095
+* New `contextsliderform` and `contextsizeinput` context form types.
+// #TINY-11342
+* New `back` function in `ContextFormApi` to go back to the previous toolbar.
+// #TINY-11344
+* New `QuickbarInsertImage` command that is executed by the `quickimage` button.
+// #TINY-11399
+* New `onSetup` function to the context form API.
+// #TINY-11494
+* New `placeholder` to the context form input field API.
+// #TINY-11459
+* New `disabled` option to restore the previous `readonly` mode behavior, allowing the editor to be displayed in a disabled state.
+// #TINY-11488
+
+=== Improved
+* Base64 data was not properly decoded due to unhandled URL-encoded characters.
+// #TINY-9548
+* The `latin` list style type is now recognized as an alias for the `alpha` list style type.
+// #TINY-11515
+
+=== Fixed
+*  Image selection was removed when calling `+editor.nodeChanged()+` while having focus inside the editor UI.
+// #TINY-11437
+*  Tooltip would not show for group toolbar button.
+// #TINY-11391
+*  Changing the table row type when a contenteditable=false cell was selected would not work as expected.
+// #TINY-11383
+*  The `samp` format was being applied as a `block` level format, instead of an `inline` format.
+// #TINY-11390
+*  Removed title attribute from dialog tree elements as they already have a tooltip.
+// #TINY-11470
+*  Fixed CSS bundling for skin UI content CSS.
+// #TINY-11558
+*  Fixed incorect resource keys for CSS bundling JS files.
+// #TINY-11558
 
 == xref:7.5-release-notes.adoc[7.5.0 - 2024-11-06]