changelog: update

CHANGELOG.md

@@ -8,13 +8,28 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### Fixed
+
+### Added
+
+### Changed
+
+## Changes Februar 2020
+
+### Fixed
+- AVRCP Target: fix reporting of PLAYBACK_STATUS_CHANGED
+
+### Changed
+- hid_host_mode: allow sniff mode
+
+## Changes January 2020
+
 ### Fixed
 - L2CAP ERTM: avoid read-after-free on decline of incoming connection
 - GATT Client: set uuid16 to zero when deserializing uuid128 services, characteristics, and descriptors
 - att_db_util: fix realloc of att db buffer for large attributes
 - btstack_tlv_posix: only keep last value in memory, fix delete operation
 - l2cap_signaling: use packet boundary flags 0x00 for LE signaling packets (ignoring hci_non_flushable_packet_boundary_flag_supported())
-- AVRCP Target: fix reporting of PLAYBACK_STATUS_CHANGED
 
 ### Added
 - att_db_util: provide GATT Database Hash via att_db_util_hash_calc
@@ -24,7 +39,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### Changed
 - btstack_crypto: update AES-CMAC implementation to access all message bytes sequentially
 
-## Changes December  2019
+## Changes December 2019
 
 ### Fixed
 - example/pan_lwip_http_server: use Network Access Point, CoD