docs: add Entity::normalizeValue() UnitEnum fix to v4.7.3 changelog (#6)

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Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: maniaba <[email protected]>

Author: Copilot

user_guide_src/source/changelogs/v4.7.3.rst

@@ -40,6 +40,7 @@ Bugs Fixed
 - **CLI:** Fixed a bug where ``CLI::generateDimensions()`` leaked ``stty`` error output (e.g., ``stty: 'standard input': Inappropriate ioctl for device``) to stderr when stdin was not a TTY.
 - **Commands:** Fixed a bug in the ``env`` command where passing options only would cause the command to throw a ``TypeError`` instead of showing the current environment.
 - **Common:** Fixed a bug where the ``command()`` helper function did not properly clean up output buffers, which could lead to risky tests when exceptions were thrown.
+- **Entity:** Fixed a bug where ``Entity::normalizeValue()`` did not handle ``UnitEnum`` before checking for ``toArray()``, causing enums implementing ``toArray()`` to be incorrectly normalized as generic objects instead of enums.
 - **Validation:** Fixed a bug where ``Validation::getValidated()`` dropped fields whose validated value was explicitly ``null``.
 
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