update changelog

Author: github-actions[bot]

docs/changelog/changelog.mdx

@@ -4,6 +4,11 @@ icon: "clock"
 iconType: "solid"
 ---
 
+<Update label="v0.52.20" description="March 24, 2025">
+### [Removed legacy agent components.](https://github.com/codegen-sh/codegen-sdk/releases/tag/v0.52.20)
+- Remove legacy agent components
+</Update>
+
 <Update label="v0.52.19" description="March 21, 2025">
 ### [Dependency update for OpenAI.](https://github.com/codegen-sh/codegen-sdk/releases/tag/v0.52.19)
 - Update OpenAI dependency to version 1.68.2