4.0

What's Changed

• KLS-668 - Upgrade to django 4.1.9 by @mforner13 in https://github.com/uktrade/directory-cms/pull/1091
• Fix - Update whitenoise usage for 6.4.0 by @mforner13 in https://github.com/uktrade/directory-cms/pull/1092

Full Changelog: 3.1.0...4.0