README.md in telegram-bot-ruby-0.3.3 vs README.md in telegram-bot-ruby-0.3.4

@@ -123,9 +123,13 @@
 `#track` method accepts 3 arguments:
 - name of event (required)
 - Telegram's user id (required)
 - hash of additional properties (optional)
 
+## Connection pool size
+
+Sometimes you need to do some heavy work in another thread and send response from where.
+
 ## Contributing
 
 1. Fork it
 2. Create your feature branch (git checkout -b my-new-feature)
 3. Commit your changes (git commit -am 'Add some feature')