fix(fetch): spotify url generation

[nevrending]

Hi, thanks for these amazing packages.

Seems like the package published at NPM is not up to date with the master branch of this repo. Thus, I'm using this package like below:

"dependencies": {
    ...
    "erela.js-spotify": "https://github.com/MenuDocs/erela.js-spotify#build",
    ...
  }

---

Adding Spotify links to the queue failed, and upon initial investigation:

{
  loadType: 'LOAD_FAILED',
  tracks: [],
  playlist: null,
  exception: {
    message: 'The track artists array was not provided',
    severity: 'COMMON'
  }
}

That led to

{ error: { status: 404, message: 'Service not found' } }

Eventually I found out that the BASE_URL in fetch was "generated" twice

{
  coreOptions: {},
  httpMethod: 'GET',
  reqHeaders: {
    authorization: 'Bearer <token>'
  },
  timeoutOptions: {},
  url: URL {
    href: 'https://api.spotify.com/v1/https://api.spotify.com/v1/tracks/2vzpoecVhBE1pKtHzKONaN',
    origin: 'https://api.spotify.com',
    protocol: 'https:',
    username: '',
    password: '',
    host: 'api.spotify.com',
    hostname: 'api.spotify.com',
    port: '',
    pathname: '/v1/https://api.spotify.com/v1/tracks/2vzpoecVhBE1pKtHzKONaN',
    search: '',
    searchParams: URLSearchParams {},
    hash: ''
  }
}

This PR fixed the URL generation

{
  coreOptions: {},
  httpMethod: 'GET',
  reqHeaders: {
    authorization: 'Bearer <token>'
  },
  timeoutOptions: {},
  url: URL {
    href: 'https://api.spotify.com/v1/tracks/2vzpoecVhBE1pKtHzKONaN',
    origin: 'https://api.spotify.com',
    protocol: 'https:',
    username: '',
    password: '',
    host: 'api.spotify.com',
    hostname: 'api.spotify.com',
    port: '',
    pathname: '/v1/tracks/2vzpoecVhBE1pKtHzKONaN',
    search: '',
    searchParams: URLSearchParams {},
    hash: ''
  }
}

And I have tested this with Spotify Track URL, Album URL, and Playlist URL.
All tracks were successfully loaded and successfully played.

Some additional environment info:

• Node.js v16.11.0
• Discord.js v13.2.0
• erela.js v2.3.3