DOC Add changelog for site tree aria attrs

Author: emteknetnz

en/08_Changelogs/6.2.0.md

@@ -22,7 +22,7 @@ A skip link has been added to the CMS to allow users to skip past the main navig
 
 #### Keyboard navigation for the site tree
 
-Keyboard navigation has been added for the site tree within the CMS. Users can now navigate, expand, and collapse tree nodes using arrow keys or the tab key. The "Page Up" and "Page Down" keys move focus to the top and bottom page in the current nesting level, and the space bar expands and collapses nodes with children.
+Keyboard navigation has been added for the site tree within the CMS. Users can now navigate, expand, and collapse tree nodes using arrow keys or the tab key. The "Page Up" and "Page Down" keys move focus to the top and bottom page in the current nesting level, and the space bar expands and collapses nodes with children. The site tree now also includes some additional ARIA attributes to improve accessibility for users relying on assistive technologies like screen readers.
 
 #### Campaign admin help menu improvements