update changelog

Author: github-actions[bot]

docs/changelog/changelog.mdx

@@ -4,6 +4,15 @@ icon: "clock"
 iconType: "solid"
 ---
 
+<Update label="v0.43.1" description="March 01, 2025">
+### [Improves test time, evaluation, and documentation.](https://github.com/codegen-sh/codegen-sdk/releases/tag/v0.43.1)
+- Improved test time by modifying validation flow
+- Enhanced evaluation with new dataset options
+- Extracted and refactored utility functions for better code organization
+- Added installation instructions for Windows/WSL
+- Updated API reference documentation
+</Update>
+
 <Update label="v0.43.0" description="February 28, 2025">
 ### [Add LLM tracing link feature for LangSmith](https://github.com/codegen-sh/codegen-sdk/releases/tag/v0.43.0)
 - Add LLM tracing link feature for LangSmith