server-tools/module_auto_update/data/cron_data.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2017 LasLabs - Dave Lasley
     Copyright 2017 Tecnativa - Jairo Llopis
     License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl). -->

<odoo noupdate="1">
    <record model="ir.cron" id="module_check_upgrades_cron">
        <field name="name">Perform Module Upgrades</field>
        <field name="active" eval="True"/>
        <field name="user_id" ref="base.user_root"/>
        <field name="interval_number">1</field>
        <field name="interval_type">days</field>
        <field name="numbercall">-1</field>
        <field name="nextcall" eval="(DateTime.now() + timedelta(days= +1)).strftime('%Y-%m-%d 3:00:00')"/>
        <field name="model_id" ref="base.model_base_module_upgrade"/>
        <field name="state">code</field>
        <field name="code">model.upgrade_module()</field>

    </record>
</odoo>