🐛 [BUG] 雷达图设置了面积area: {}，y值有负数时面积绘制不对

[Gaqier]

🐛 Bug description [Please make everyone to understand it]

Please provide a link by forking these links G2Plot or GitHub repo, a minimal reproduction.

• Required Link to minimal reproduction:

📷 Step to reproduce

import { Radar } from '@antv/g2plot';

const data = [
  { name: '通风时间', star: 8 },
  { name: '毒物浓度', star: 0.60 },
  { name: 'lny', star: -1.28 },
];
const radarPlot = new Radar('container', {
  renderer: 'svg',
  data,
  xField: 'name',
  yField: 'star',
  point: {
    size: 2,
  },
  area: {},
});
radarPlot.render();

绘制效果为

🏞 Expected result

面积正常绘制

🚑 Any additional [like screenshots]

• G2Plot Version: 2.4.25
• Platform: chrome