DOC-2598: Uncomment missing entries in the changelog

Author: Farzad Hayatbakhsh

modules/ROOT/pages/changelog.adoc

@@ -1,5 +1,5 @@
 = Changelog
-:description: The history of TinyMCE releases.
+:description: The history of {productname} releases.
 :keywords: changelog
 
 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].
@@ -22,10 +22,10 @@ NOTE: This is the {productname} Community version changelog. For information abo
 * 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.
+=== 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.
+* The `latin` list style type is now recognized as an alias for the `alpha` list style type.
 // #TINY-11515
 
 === Fixed