odoo18/addons_extensions/hr_timeoff_extended/data/cron.xml

<?xml version="1.0" encoding="UTF-8" ?>
<odoo>
    <data>
                <record id="hr_holidays.hr_leave_allocation_cron_accrual" model="ir.cron">
        <field name="code">model._update_accrual()</field>
    </record>

    </data>
</odoo>