Update changelog for release v2.4.0 (#481)

* Update changelog for release v2.4.0

* add missing changelog entries

Changelog.md

@@ -1,14 +1,20 @@
 # CHANGELOG
 All notable changes to this project will be documented here.
 
-## [unreleased]
-
+## [v2.4.0]
 - Fix bug that prevented test results from being returned when a feedback file could not be found (#458)
 - Add support for Python 3.11 and 3.12 (#467)
 - Track test environment setup status and report errors when running tests if environment setup is in progress or raised an error (#468)
 - Update Haskell tester to use [Stack](https://docs.haskellstack.org/en/stable/) to install dependencies (#469)
 - Improve default error message when a test group times out (#470)
 
+## [v2.3.3]
+- Updated python-ta to 2.6.2 (#454)
+
+## [v2.3.2]
+- Fix a bug in the Java tester, where failed/error tests were being detected as passing. (#451)
+- updated python-ta to 2.6.1 (#452)
+
 ## [v2.3.1]
 - Fix a bug that prevented test file from being copied from a zip file to another location on disk (#426)