update: changelog

CHANGELOG.md

@@ -1,7 +1,9 @@
 # Change Log
 
-## [7.1.0](https://github.com/plivo/plivo-go/tree/v7.1.0) (2021-07-06)
--  Powerpack ID filter for list MDR
+## [7.1.0](https://github.com/plivo/plivo-go/tree/v7.1.0) (2021-07-13)
+- Power pack ID has been included to the response for the [list all messages API](https://www.plivo.com/docs/sms/api/message/list-all-messages/) and the [get message details API](https://www.plivo.com/docs/sms/api/message#retrieve-a-message).
+- Support for filtering messages by Power pack ID has been added to the [list all messages API](https://www.plivo.com/docs/sms/api/message#list-all-messages).
+
 
 ## [7.0.0](https://github.com/plivo/plivo-go/tree/v7.0.0) (2021-07-05)
 - **BREAKING**: Remove the total_count parameter in meta data for list MDR response