Add CHANGELOG for 0.1.0b5 hotfix release (microsoft#128)

Adds b5 changelog entry for the UpsertMultiple fix (microsoft#127).

Co-authored-by: tpellissier <tpellissier@microsoft.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 3 people

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/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.1.0b5] - 2026-02-27
+
+### Fixed
+- UpsertMultiple: exclude alternate key fields from request body (#127). The create path of UpsertMultiple failed with `400 Bad Request` when alternate key column values appeared in both the body and `@odata.id`.
+
 ## [0.1.0b4] - 2026-02-25
 
 ### Added
@@ -65,6 +70,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Comprehensive error handling with specific exception types (`DataverseError`, `AuthenticationError`, etc.) (#22, #24)
 - HTTP retry logic with exponential backoff for resilient operations (#72)
 
+[0.1.0b5]: https://github.com/microsoft/PowerPlatform-DataverseClient-Python/compare/v0.1.0b4...v0.1.0b5
 [0.1.0b4]: https://github.com/microsoft/PowerPlatform-DataverseClient-Python/compare/v0.1.0b3...v0.1.0b4
 [0.1.0b3]: https://github.com/microsoft/PowerPlatform-DataverseClient-Python/compare/v0.1.0b2...v0.1.0b3
 [0.1.0b2]: https://github.com/microsoft/PowerPlatform-DataverseClient-Python/compare/v0.1.0b1...v0.1.0b2