Update development dependencies in CHANGELOG

In this commit, we updated the list of development dependencies listed in the CHANGELOG. Specifically, we've added the library 'Pillow' with version 10.2.0 to our dependencies' setup. This inclusion is part of an effort to keep our dependencies up to date.

CHANGELOG.rst

@@ -6,7 +6,7 @@ v4.10.0 (5MAR24)
 * :+1: Added the possibility to download, upload and reference `StoredFiles`. (#1361)
 * :+1: Added functions to handle `StoredFileReferenceProperty`. The behaviour is consistent to the one for the `AttachmentProperty` to facilitate conversion. (#1361)
 * :+1: Added python tests for 3.12. (#1389)
-* :+1: dependent versions for development: tox (4.12.1), flake8 (7.0.0), jsonschema (4.21.1), importlib-metadata (7.0.1), mypy (1.8.0), pytest (8.1.0), coverage (7.4.3), pre-commit (3.6.2), pytz (2024.1), pytest-xdist (3.5.0), semver (3.0.2)
+* :+1: dependent versions for development: tox (4.12.1), flake8 (7.0.0), jsonschema (4.21.1), importlib-metadata (7.0.1), mypy (1.8.0), pytest (8.1.0), coverage (7.4.3), pre-commit (3.6.2), pytz (2024.1), pytest-xdist (3.5.0), semver (3.0.2), Pillow (10.2.0)
 
 
 v4.9.0 (28SEP23)