update changelog

Changelog.md

@@ -2,6 +2,12 @@
 
 All notable changes to this project will be documented in this file.
 
+
+## [0.28] - 2023-08-16
+- Added migration that updates all surveys to the fixed version
+- Correctly handle read-only/edit mode (especially when user cannot edit)
+- Updated survey description text
+
 ## [0.27] - 2023-08-15
 - Added edit mode for surveys
 - Fixed mistakes in survey titles and reordered service section