core/homeassistant/components/update/icons.json

{
  "entity_component": {
    "_": {
      "default": "mdi:package-up",
      "state": {
        "off": "mdi:package"
      }
    }
  },
  "services": {
    "clear_skipped": "mdi:package",
    "install": "mdi:package-down",
    "skip": "mdi:package-check"
  }
}