I am trying to load custom js and css in my module but .css file is loading perfectly but js is  not loading.

my code is below

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <data>
        <template id="assets_backend_" name="Extra Feature" inherit_id="web.assets_backend">
            <xpath expr=".">
                <script type="text/javascript" src="/my_module/static/src/js/labou.js"/>
                <link rel="stylesheet" href="/my_module/static/src/css/labou.css"/>
            </xpath>
        </template>

    </data>
</odoo>