add identify changelog

Author: shaydewael

docs/Change_Log.md

@@ -1,5 +1,13 @@
 # Change Log
 
+## Updated Connection Property Field Names
+
+#### Jun 17, 2022
+
+The `$` prefix in [identify connection properties](#DOCS_TOPICS_GATEWAY/identify-identify-connection-properties) are deprecated. The new field names are `os`, `browser`, and `device`. When passed, the `$`-prefixed names will resolve to the new ones. 
+
+In the next major API version, support for the previous field names (`$os`, `$browser`, and `$device`) will be removed.
+
 ## Updated Command Permissions
 
 #### Apr 27, 2022

docs/topics/Gateway.md

@@ -564,7 +564,7 @@ Used to trigger the initial handshake with the gateway.
 | device | string | your library name     |
 
 > warn
-> These fields originally were $ prefixed (i.e: $browser) but this syntax is deprecated. While they currently still work, it is recommended to move to non-prefixed fields.
+> These fields originally were $ prefixed (i.e: `$browser`) but [this syntax is deprecated](#DOCS_CHANGE_LOG/updated-connection-property-field-names). While they currently still work, it is recommended to move to non-prefixed fields.
 
 ###### Example Identify