I need to create module, which alters template for receipt from point_of_sale module. In documentation it is said that in order to do so one needs just:

<t t-extend="base.template">
    <t t-jquery="ul" t-operation="append">
        <li>new element</li>
    </t>
</t>

I created module and added file in static/src/xml folder, where written following:

<?xml version="1.0" encoding="UTF-8"?>
<templates id="template" xml:space="preserve">
    <t t-extend="point_of_sale.XmlReceipt">
      <t t-jquery="div.orderlines" t-operation="append">
         <h2>Hello world!</h2>
      </t>
    </t></templates>

But receipt template remains the same. Am I missing something?