TASK: Add changelog for 7.3.9 [skip ci]

See https://jenkins.neos.io/job/flow-release/391/

Neos.Flow/Documentation/TheDefinitiveGuide/PartV/ChangeLogs/739.rst

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+`7.3.9 (2022-11-03) <https://github.com/neos/flow-development-collection/releases/tag/7.3.9>`_
+==============================================================================================
+
+Overview of merged pull requests
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+`BUGFIX: Allow updating of entities related to value objects after persisting <https://github.com/neos/flow-development-collection/pull/2871>`_
+-----------------------------------------------------------------------------------------------------------------------------------------------
+
+* Fixes: `#2870 <https://github.com/neos/flow-development-collection/issues/2870>`_
+
+**Upgrade instructions**
+
+**Review instructions**
+
+
+`BUGFIX: disable invisible composer interaction in `./flow package:create` <https://github.com/neos/flow-development-collection/pull/2926>`_
+--------------------------------------------------------------------------------------------------------------------------------------------
+
+closes `#2757 <https://github.com/neos/flow-development-collection/issues/2757>`_
+
+with `#2571 <https://github.com/neos/flow-development-collection/issues/2571>``_was introduced, that the composer subcommand used by ``./flow package:create`` hides its output. But using the ``new NullOutput()` doesn't prevent any interaction initiated by composer such as the infamous:
+
+> neos/composer-plugin contains a Composer plugin which is currently not in your allow-plugins config. See https://getcomposer.org/allow-plugins
+> Do you trust "neos/composer-plugin" to execute code and wish to enable it now? (writes "allow-plugins" to composer.json) [y,n,d,?]
+
+the current problem is that composer asks this question but shows not output. So one has to blind input ``y`` without even knowing the question. This is perceived as bug but clearly a feature see #2757.
+
+With this bugfix we use the official supported cli flag ``--quiet`` to archive the same as the NullOutput and furthermore disable any invisible requested interactivity.
+
+in the above case instead of a question - an error will be thrown, which is understandable and fixable by the user:
+
+> In PluginManager.php line 768:
+> neos/composer-plugin contains a Composer plugin which is blocked by your allow-plugins config. You may add it to the list if you consider it safe.
+> ...
+> The installation was not successful.
+> Composer returned the error code: 1
+>
+>  Type: Neos\\Flow\\Package\\Exception
+>  Code: 1572187932
+>  File: Packages/Framework/Neos.Flow/Classes/Package/PackageManager.php
+>  Line: 391
+>
+> Open Data/Logs/Exceptions/202210221257240bfbde.txt for a full stack trace.
+
+**Upgrade instructions**
+
+**Review instructions**
+
+
+* Packages: ``Flow``
+
+`BUGFIX: Make PdoBackend.rewind() on PostgreSQL work <https://github.com/neos/flow-development-collection/pull/2924>`_
+----------------------------------------------------------------------------------------------------------------------
+
+* See: `#2838 <https://github.com/neos/flow-development-collection/issues/2838>`_
+
+
+`BUGFIX: Avoid errors when `./flow help` is shown for an action without doc-block <https://github.com/neos/flow-development-collection/pull/2883>`_
+---------------------------------------------------------------------------------------------------------------------------------------------------
+
+The ``./flow help`` command currently throws errors when rendering details for command that has no doc-block.
+Since modern php and flow need those doc-blocks less and less this should be supported aswell.
+
+This change will return the argument name as description when no @param annotation is found for a parameter.
+This is not as helpful as a description but shows the parameter and avoids an unnecessary error.
+
+**Review instructions**
+
+Remove the doc comments from a cli-command and run ``./flow help command:name`` ... without this change the code will end throwing an exception.
+
+
+* Fixes: `#2886 <https://github.com/neos/flow-development-collection/issues/2886>`_
+
+
+* Packages: ``Flow``
+
+`TASK: Render API docs (again) <https://github.com/neos/flow-development-collection/pull/2921>`_
+------------------------------------------------------------------------------------------------
+
+This renders API docs (again), using Doctum via GH Actions.
+
+The results are pushed to https://neos.github.io for consumption.
+
+**Review instructions**
+
+A test run result can be seen at https://neos.github.io/flow/8.2/index.html already. The workflow run is visible at https://github.com/kdambekalns/flow-development-collection/actions/runs/3233003582/jobs/5294292366
+
+See also `#1 <https://github.com/kdambekalns/apigenerator.org/issues/1>`_
+
+**TODO**
+
+- [x] Links to GitHub are wrong (``workspace`` must go and branch is wrong)
+- [ ] Maybe add a theme to make it look more Neos-y?
+
+
+* Packages: ``.github``
+
+`TASK: precompose hash to prevent timing attacks <https://github.com/neos/flow-development-collection/pull/2915>`_
+------------------------------------------------------------------------------------------------------------------
+
+Precomposing a hash on cache warmup will make sure that the used hash to prevent timing attack always reflects the current configuration.
+
+Previously there was a bcrypt password with the cost of 16 hard coded in but the configuration was set to 14 as default.
+
+Fixes `#3908 <https://github.com/neos/neos-development-collection/issues/3908>`_ reported by @Benjamin-K
+
+
+* Packages: ``Flow``
+
+`TASK: Improve command documentation <https://github.com/neos/flow-development-collection/pull/2910>`_
+------------------------------------------------------------------------------------------------------
+
+Update the cli command example in the documentation to follow best practices.
+In commands, when showing a progress bar, using ->progressFinish() does not output a newline. This is intended, as it allows adding further text in the same line. However, the full command output - unless empty - should end with a newline.
+
+See https://github.com/neos/neos-development-collection/issues/3894
+
+
+* Packages: ``Flow``
+
+`TASK: Adjust Neos.DocTools settings <https://github.com/neos/flow-development-collection/pull/2885>`_
+------------------------------------------------------------------------------------------------------
+
+See https://github.com/neos/doctools/pull/4
+
+
+* Packages: ``Flow``
+
+`Detailed log <https://github.com/neos/flow-development-collection/compare/7.3.7...7.3.9>`_
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~