Update changelog for v0.0.78 (#32)

Co-Authored-By: unknown <>

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

Author: devin-ai-integration[bot]

CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.0.78] - 2025-04-14
+
+### Added
+- Add welcome encoding functionality for agent responses ([#31](https://github.com/agentuity/sdk-py/pull/31))
+
 ## [0.0.77] - 2025-04-07
 
 ### Added