Axis "description" is not overriding default aria-label

[ritacosta0]

Bug Description

The description property with alt.Axis is not overriding the default aria-label. Below is the chart spec similar to what I'm trying to achieve. To confirm that the description is not overriding the default aria-label I'm inspecting the chart's code on the browser. For this example, the aria-label for the x-axis is:

{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.20.1.json",
  "config": {
    "view": {
      "continuousHeight": 300,
      "continuousWidth": 300
    }
  },
  "data": {
    "name": "data-a"
  },
  "datasets": {
    "data-a": [
      {
        "a": "A",
        "b": 28
      },
      {
        "a": "B",
        "b": 55
      },
      {
        "a": "C",
        "b": 43
      },
      {
        "a": "D",
        "b": 91
      },
      {
        "a": "E",
        "b": 81
      },
      {
        "a": "F",
        "b": 53
      },
      {
        "a": "G",
        "b": 19
      },
      {
        "a": "H",
        "b": 87
      },
      {
        "a": "I",
        "b": 52
      }
    ]
  },
  "encoding": {
    "x": {
      "axis": {
        "description": "test",
        "labelAngle": 0
      },
      "field": "a",
      "type": "nominal"
    },
    "y": {
      "field": "b",
      "type": "quantitative"
    }
  },
  "mark": {
    "type": "bar"
  }
}