使用Chart.js版本3，如何在堆叠条形图上左对齐y轴标签？

var ctx = document.getElementById('myChart').getContext('2d');
var myChart = new Chart(ctx, {
    type: 'bar',
    data: {
        labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
        datasets: [{
            label: 'Dataset 1',
            data: [10, 20, 30, 40, 50, 60, 70],
            backgroundColor: 'rgba(75, 192, 192, 0.2)',
            borderColor: 'rgba(75, 192, 192, 1)',
            borderWidth: 1
        }, {
            label: 'Dataset 2',
            data: [20, 30, 40, 50, 60, 70, 80],
            backgroundColor: 'rgba(255, 99, 132, 0.2)',
            borderColor: 'rgba(255, 99, 132, 1)',
            borderWidth: 1
        }]
    },
    options: {
        scales: {
            y: {
                beginAtZero: true,
                ticks: {
                    callback: function(value, index, values) {
                        return value.toString().padStart(5, ' '); // 左对齐标签
                    },
                    padding: -10 // 调整标签与轴的距离
                }
            },
            x: {
                stacked: true
            }
        },
        plugins: {
            legend: {
                display: true
            }
        }
    }
});