prepare new release

Changelog.md

@@ -3,6 +3,16 @@
 All notable changes to this project will be documented in this file.
 
 
+## [0.29] - 2023-08-20
+- More fixes to the survey model
+- Fix small bugs in the progress bars
+- Update the surveyjs version because it fixes a bug with the validation not jumping to the right question
+- When editing the survey and clicking the back button now also gives a warning message if you stay on the survey website
+- The conversion for prefill data now also includes data for the service matrix questions
+- The next button is visible again to help with navigation
+- The tooltips in the service matrix section are improved
+- A completed survey can now not be saved anymore without validation
+
 ## [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)