chart.js:如何使雷达图的轴标签更大？

var radarConfig = {
  type: 'radar',
  data: {
    labels: ['标签1', '标签2', '标签3', '标签4', '标签5'],
    datasets: [{
      label: '数据集1',
      data: [10, 20, 30, 40, 50],
      backgroundColor: 'rgba(255, 99, 132, 0.2)',
      borderColor: 'rgba(255, 99, 132, 1)',
      borderWidth: 1
    }]
  },
  options: {
    scale: {
      pointLabels: {
        fontSize: 16 // 设置轴标签的字体大小
      }
    }
  }
};

var radarChart = new Chart(document.getElementById('radarChart'), radarConfig);