Vega Lite曲线图在X轴上的月份排序

{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
  "data": {
    "values": [
      {"month": "January", "value": 10},
      {"month": "February", "value": 15},
      {"month": "March", "value": 8},
      {"month": "April", "value": 12},
      {"month": "May", "value": 6},
      {"month": "June", "value": 9},
      {"month": "July", "value": 11},
      {"month": "August", "value": 14},
      {"month": "September", "value": 7},
      {"month": "October", "value": 13},
      {"month": "November", "value": 5},
      {"month": "December", "value": 10}
    ]
  },
  "mark": "line",
  "encoding": {
    "x": {
      "field": "month",
      "type": "ordinal",
      "sort": {"field": "month", "order": "ascending"}
    },
    "y": {"field": "value", "type": "quantitative"}
  }
}