Je ne peux pas modifier le style de ma ligne de tendance

<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-trendline"></script>

{% for currency, rates in data.items %}
    var ctx = document.getElementById("chart-{{ currency }}");
    new Chart(ctx, {
            type: 'line',
            data:  {labels: {{ days_labels|safe }},
                    datasets: [{
                       label: "{{ currency }}",
                       data:{{ rates|safe }},
                       fill: false,
                       borderColor: 'rgb(255, 128, 128)',
                       trendlineLinear: {
                        style: "#9fd6f4",
                        width: 3
                       }
                     }]

{
    trendlineLinear: {
        colorMin: "red",
        colorMax: "green",
        lineStyle: "dotted|solid",
        width: 2,
        projection: true|false (optional)
    }
}