Access to undeclared static property: $recursiveRenderDepth

The above was probably caused by some older patches in https://www.drupal.org/node/2940605 → being applied, as noted in https://www.drupal.org/project/drupal/issues/2940605#comment-13700851 🐛 Can only intentionally re-render an entity with references 20 times Needs work

The parent implementation of the property is:

<?php
  protected static $recursiveRenderDepth = [];
?>

not

<?php
  protected static array $recursiveRenderDepth = [];
?>

Updated patch to fix.