Fix upgrade notice for v1.4

README.md

@@ -36,7 +36,7 @@ Navigate to **Settings > Writing** in your WordPress Dashboard, and look for the
 ## Changelog ##
 
 ### 1.4 ###
-* Introduce native Gutenberg sidebar component for supported post types.
+* Introduce block-editor (Gutenberg) sidebar component for supported post types.
 
 ### 1.3 ###
 * Add bulk actions to purge excess or all revisions.
@@ -54,6 +54,9 @@ Navigate to **Settings > Writing** in your WordPress Dashboard, and look for the
 
 ## Upgrade Notice ##
 
+### 1.4 ###
+Introduces block-editor (Gutenberg) sidebar component for supported post types.
+
 ### 1.3 ###
 Introduces bulk actions for purging revisions, along with unit tests. The plugin also conforms to coding standards.