report_redner.xml

<?xml version="1.0" encoding="utf-8" ?>
<odoo>
    <template id="assets_backend" name="report assets" inherit_id="web.assets_backend">
        <xpath expr="." position="inside">
            <script
                type="text/javascript"
                src="/redner/static/src/js/redneractionmanager.js"
            />
        </xpath>
    </template>
</odoo>