fix: clarify contructor docblock

Author: landure

src/MartinGeorgiev/Doctrine/DBAL/Types/ValueObject/LtreeInterface.php

@@ -7,10 +7,10 @@
 interface LtreeInterface extends \Stringable, \JsonSerializable
 {
     /**
-     * @param list<non-empty-string> $pathFromRoot
+     * @param list<non-empty-string> $pathFromRoot A list with one element represents the root. The list may be empty.
      *
      * @throws \InvalidArgumentException if the pathFromRoot is not a valid ltree path
-     *                                   (contains empty labels, consecutive dots, or starts/ends with a dot)
+     *                                   (contains labels which are empty or contains one or more dots)
      */
     public function __construct(array $pathFromRoot);