Update links in documentation (#969)

* updating links to Spotify documentation

* add changes to CHANGELOG.md

docs/index.rst

@@ -5,7 +5,7 @@ Welcome to Spotipy!
 ===================================
 
 *Spotipy* is a lightweight Python library for the `Spotify Web API
-<https://developer.spotify.com/web-api/>`_. With *Spotipy*
+<https://developer.spotify.com/documentation/web-api/>`_. With *Spotipy*
 you get full access to all of the music data provided by the Spotify platform.
 
 Assuming you set the ``SPOTIPY_CLIENT_ID`` and ``SPOTIPY_CLIENT_SECRET``
@@ -71,7 +71,7 @@ Features
 *Spotipy* supports all of the features of the Spotify Web API including access
 to all end points, and support for user authorization. For details on the
 capabilities you are encouraged to review the `Spotify Web
-API <https://developer.spotify.com/web-api/>`_ documentation.
+API <https://developer.spotify.com/documentation/web-api/>`_ documentation.
 
 Installation
 ============
@@ -143,7 +143,7 @@ Scopes
 ------
 
 See `Using
-Scopes <https://developer.spotify.com/documentation/general/guides/authorization/scopes/>`_ for information
+Scopes <https://developer.spotify.com/documentation/web-api/concepts/scopes/>`_ for information
 about scopes.
 
 Redirect URI