bugfix/userlist: add genre/demographic IDs to URL

[purarue]

On a request like https://api.jikan.moe/v3/user/QCTFW/animelist

Currently it looks like:

{
  "genres": [
        {
          "mal_id": 0,
          "type": "anime",
          "name": "Comedy",
          "url": "https://myanimelist.net/anime/genre/Comedy"
        },
        {
          "mal_id": 0,
          "type": "anime",
          "name": "Romance",
          "url": "https://myanimelist.net/anime/genre/Romance"
        },
        {
          "mal_id": 0,
          "type": "anime",
          "name": "Slice of Life",
          "url": "https://myanimelist.net/anime/genre/Slice of Life"
        }
      ],
      "demographics": [
        {
          "mal_id": 0,
          "type": "anime",
          "name": "Shounen",
          "url": "https://myanimelist.net/anime/genre/Shounen"
        }
      ]
}

Since the mal id isn't put into the MalUrl object, so it can't parse it out of the URL

Just added it as part of the URL, previous URLs weren't valid

[irfan-dahir]

Thank you!

Edit: Pushed the update to the server.