PHP Deprecated: Creation of dynamic property on updates check

[M-Falken]

Steps to reproduce the issue
The automatic check of updates when you access the Admin Panel

PHP Deprecated: Creation of dynamic property Joomla\CMS\Updater\Update::$length is deprecated in /libraries/src/Updater/Update.php on line 486

joomla-cms/libraries/src/Updater/Update.php

Line 486 in f6bebdd

$this->$key = $val;

Joomla! 5.1.3
php 8.3.10

[kayohf]

For now would be good to just set the AllowDynamicProperties attribute -> https://www.php.net/manual/en/class.allowdynamicproperties.php

[alikon]

same as #44284

[rdeutz]

Duplicate, so I am closing this one, see #44284 for more information, thanks for reporting though