Dead link in README.md

[Kalmarv]

There is a dead link under the Authorization section in the README file.

Dead Link: https://developer.spotify.com/spotify-web-api/tutorial/

This link is the replacement for it: https://developer.spotify.com/documentation/web-api/quick-start/

Relevant Line:

The first thing you need to do is to create an application. A step-by-step tutorial is offered by Spotify in this tutorial.