chore: updated changelog

Signed-off-by: Manish Dait <daitmanish88@gmail.com>

Author: manishdait

CHANGELOG.md

@@ -10,6 +10,7 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 - Fix the TransactionGetReceiptQuery to raise ReceiptStatusError for the non-retryable and non success receipt status
 - Refactor `AccountInfo` to use the existing `StakingInfo` wrapper class instead of flattened staking fields. Access is now via `info.staking_info.staked_account_id`, `info.staking_info.staked_node_id`, and `info.staking_info.decline_reward`. The old flat accessors (`info.staked_account_id`, `info.staked_node_id`, `info.decline_staking_reward`) are still available as deprecated properties and will emit a `DeprecationWarning`. (#1366)
 - Added abstract `Key` supper class to handle various proto Keys.
+-  Added Transaction size calculation properties `size`, `body_size` and `body_size_all_chunks`.
 
 ### Examples