Apply automated PHP8 safety transforms

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Co-authored-by: iaretechnician <2749183+iaretechnician@users.noreply.github.com>

modules/news/include/library/HTMLPurifier/ChildDef/List.php

@@ -52,7 +52,7 @@ class HTMLPurifier_ChildDef_List extends HTMLPurifier_ChildDef
 
         $current_li = false;
 
-        foreach ($children as $node) {
+        foreach ((array)$children as $node) {
             if (!empty($node->is_whitespace)) {
                 $result[] = $node;
                 continue;