Update Changelog.

Author: irazasyed

CHANGELOG.md

@@ -4,6 +4,13 @@ All notable changes to `telegram` will be documented in this file
 
 ## Unreleased
 
+- Register Telegram instance to container. 
+- Add `TelegramUpdates` to retrieve bot updates. PR [133](https://github.com/laravel-notification-channels/telegram/pull/133).
+- Refactor TelegramChannel. PR [136](https://github.com/laravel-notification-channels/telegram/pull/136).
+- Add Retrieving Chat ID docs and improve docs.
+- Add missing type declaration and minor improvements to various methods.
+- Add Contact Support. PR [138](https://github.com/laravel-notification-channels/telegram/pull/138).
+
 ## 0.9.0 - 2021-11-24
 
 - Add Poll Support. PR [130](https://github.com/laravel-notification-channels/telegram/pull/130).