Update changelog

CHANGELOG.rst

@@ -6,6 +6,14 @@ All notable changes to this project will be documented in this file.
 The format is based on `Keep a Changelog`_,
 and this project adheres to `Semantic Versioning`_.
 
+`1.5.1`_
+--------
+
+Fixed
+~~~~~
+
+* Fix total amount calculation for event registrations with donations.
+
 `1.5`_
 ------
 
@@ -167,3 +175,4 @@ Added
 .. _1.4.5: https://edugit.org/Teckids/hacknfun//AlekSIS-App-Paweljong/-/tags/1.4.5
 .. _1.4.6: https://edugit.org/Teckids/hacknfun//AlekSIS-App-Paweljong/-/tags/1.4.6
 .. _1.5: https://edugit.org/Teckids/hacknfun//AlekSIS-App-Paweljong/-/tags/1.5
+.. _1.5.1: https://edugit.org/Teckids/hacknfun//AlekSIS-App-Paweljong/-/tags/1.5.1