Changelog 3.3.15

Co-authored-by: Drillin <sio.drillin@gmail.com>

Author: github-actions[bot]

CHANGELOG-3.3.md

@@ -1,6 +1,15 @@
 Changelog
 =========
 
+Version 3.3.15
+--------------
+
+Release on 2021-03-25
+
+- Fix database migrator: sequence should be updated 
+- Update Jelix to fix an issue in the installer
+- Fix 'Undefined index' notice
+
 Version 3.3.14
 --------------
 Release on 2021-03-04