Update CHANGES.rst for PR #420

Author: SmileyChris

CHANGES.rst

@@ -48,6 +48,7 @@ WIP 8.x
 - Migrate pyproject.toml to PEP 621-compliant [project] metadata format. (hroncok in `#399`_)
 - Improved test coveraged (akx in `#315`_)
 - Implement Ruff rules and perform comprehensive code cleanup. (bartTC in `#408`_)
+- Modernize development setup: use ``uv`` and ``just``, add support for Python 3.14, and drop support for Python 3.9. (hugovk in `#420`_)
 
 .. _#315: https://github.com/lincolnloop/python-qrcode/pull/315
 .. _#349: https://github.com/lincolnloop/python-qrcode/pull/349
@@ -57,6 +58,7 @@ WIP 8.x
 .. _#400: https://github.com/lincolnloop/python-qrcode/pull/400
 .. _#408: https://github.com/lincolnloop/python-qrcode/pull/408
 .. _#412: https://github.com/lincolnloop/python-qrcode/pull/412
+.. _#420: https://github.com/lincolnloop/python-qrcode/pull/420
 
 8.2 (01 May 2025)
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