chore: update changelog

Signed-off-by: dosi <[email protected]>

Author: Dosik13

CHANGELOG.md

@@ -7,6 +7,8 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 ## [Unreleased]
 
 ### Added
+- added FreezeTransaction class
+- added FreezeType class
 - docs: Add Google-style docstrings to `TokenId` class and its methods in `token_id.py`.
 - added Google-style docstrings to the `TransactionRecord` class including all dataclass fields, `__repr__`, `_from_proto()` & `_to_proto()` methods.
 - Standardized docstrings, improved error handling, and updated type hinting (`str | None` to `Optional[str]`) for the `FileId` class (#652).