Buttons::updateLanding

static function updateLanding(int $lid): void
{
	$res = BlockTable::getList(
		[
			'select' => [
				'ID', 'CONTENT'
			],
			'filter' => [
				'LID' => $lid,
			],
		]
	);
	while ($row = $res->fetch())
	{
		if(self::isOldButton($row['CONTENT']))
		{
			$buttonBlock = new self($row['ID'], $row['CONTENT']);
			$buttonBlock->update();
		}
	}
}