TASK: Add changelog for 8.3.2 [skip ci]

See https://jenkins.neos.io/job/neos-release/377/

Neos.Neos/Documentation/Appendixes/ChangeLogs/832.rst

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+`8.3.2 (2023-05-01) <https://github.com/neos/neos-development-collection/releases/tag/8.3.2>`_
+==============================================================================================
+
+Overview of merged pull requests
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+`BUGFIX: HtmlAugmenter & Attributes Rendering <https://github.com/neos/neos-development-collection/pull/4225>`_
+---------------------------------------------------------------------------------------------------------------
+
+* Fixes: `#4213 <https://github.com/neos/neos-development-collection/issues/4213>`_ - null should not remove existing attribute
+
+Fixes applying string on existing empty attribute
+(or empty string)
+
+Thanks to @tellenrieder @ClaraRuna and @KommunikativCh and @fcool  ;) 
+
+**Upgrade instructions**
+
+
+* Packages: ``Neos`` ``Fusion``
+
+`Detailed log <https://github.com/neos/neos-development-collection/compare/8.3.1...8.3.2>`_
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~