Hello I am very new in using Vega lite, I want to try to use the data from https://automaticknowledge.org/wpc-hex/uk-constituencies-2024-21-june-24.geojson to show the UK election result on the map, but nothing show up, is this something to do with the URL ?

This is the code

{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.18.1.json",
  "width": 700,
  "height": 500,
  "config": {
    "view": {"stroke": "transparent"}
  },
  "data": {
    "url": "https://automaticknowledge.org/wpc-hex/uk-constituencies-2024-21-june-24.geojson",
    "format": {"feature": "properties", "type": "topojson"}
  },
  "mark": {"type": "geoshape"},
  "projection": {
    "type": "mercator"
 
  }
}