Update changelog

Author: Johannesd3

CHANGELOG.md

@@ -7,13 +7,19 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+* [connect], [discovery] The crate `librespot-discovery` for discovery in LAN was created. Its functionality was previously part of `librespot-connect`.
+
 ### Removed
 
 * [librespot-audio] Removed `VorbisDecoder`, `VorbisError`, `AudioPacket`, `PassthroughDecoder`, `PassthroughError`, `AudioError`, `AudioDecoder` and the `convert` module from `librespot_audio`. The underlying crates `vorbis`, `librespot-tremor`, `lewton` and `ogg` should be used directly.
 
 ### Fixed
 
-* [librespot-playback] Incorrect `PlayerConfig::default().normalisation_threshold` caused distortion when using dynamic volume normalisation downstream
+* [librespot-playback] Incorrect `PlayerConfig::default().normalisation_threshold` caused distortion when using dynamic volume normalisation downstream in librespot-connect was deprecated in favor of the `librespot-discovery` crate.
+
+### Deprecated
+* [connect] The `discovery` module.
 
 ## [0.2.0] - 2021-05-04