How to add line between row 1 and row 2 in sales invoice

border-bottom-width: 1px; border-bottom-color: #000000; border-bottom-style: solid;
    <tbody>
        {% for row in table.rows %}
        <tr>
            {% for cell in row.cells %}
            <td style="writing-mode: horizontal-tb; border-bottom-width: 1px; border-bottom-color: #000000; border-bottom-style: solid; border-inline-start-width: 1px; border-inline-start-style: solid; border-inline-start-color: #000; {% if forloop.last == true %} border-inline-end-width: 1px; border-inline-end-style: solid; border-inline-end-color: #000{% endif %}; padding: 5px 10px; text-align: {{ table.columns[forloop.index0].align }}; {% if table.columns[forloop.index0].nowrap %}; white-space: nowrap; width: 80px{% endif %}">{{ cell.text | newline_to_br }}</td>
            {% endfor %}
        </tr>
        {% endfor %}
        <!-- tr>
        {% for column in table.columns %}
            <td style="writing-mode: horizontal-tb; border-inline-start-width: 1px; border-inline-start-style: solid; border-inline-start-color: #000; {% if forloop.last == true %} border-inline-end-width: 1px; border-inline-end-style: solid; border-inline-end-color: #000{% endif %}; border-bottom-width: 1px; border-bottom-color: #000000; border-bottom-style: solid">&nbsp;</td>
        {% endfor %}
        </tr -->