update changelog

Author: github-actions[bot]

docs/changelog/changelog.mdx

@@ -4,6 +4,21 @@ icon: "clock"
 iconType: "solid"
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+<Update label="v0.48.8" description="March 11, 2025">
+### [Enhancements in documentation and repository retrieval.](https://github.com/codegen-sh/codegen-sdk/releases/tag/v0.48.8)
+- Bug fix: updated openai dependency to v1.66.0
+- Added architecture documentation
+- Enhanced API reference documentation
+- Introduced full history option in repository retrieval
+</Update>
+
+
+<Update label="v0.48.7" description="March 10, 2025">
+### [Enhances error handling and adds custom langgraph nodes.](https://github.com/codegen-sh/codegen-sdk/releases/tag/v0.48.7)
+- Improved error handling with enhanced retry policy
+- Introduced custom langgraph nodes
+</Update>
+
 <Update label="v0.48.6" description="March 10, 2025">
 ### [Fixes null body issue in pull request context.](https://github.com/codegen-sh/codegen-sdk/releases/tag/v0.48.6)
 - Fix null body issue in pull request context