Changelog.md

@@ -9,6 +9,9 @@ Dates and release notes for all production releases of the Briar Desktop program
 * First version that's available for MS Windows
 * Update Briar core to [1.4.20](https://code.briarproject.org/briar/briar/-/wikis/changelog#anchor-1420)
 * Update translations and add Taiwanese Mandarin
+* Changing password happens in IO thread
+* Unread message badge in sidebar
+* Various UI tweaks
 
 ### [0.3.1-beta](https://code.briarproject.org/briar/briar-desktop/-/commits/0.3.1-beta)