update changelog

Author: github-actions[bot]

docs/changelog/changelog.mdx

@@ -4,6 +4,11 @@ icon: "clock"
 iconType: "solid"
 ---
 
+<Update label="v0.54.1" description="April 08, 2025">
+### [Fixes undefined field type bug](https://github.com/codegen-sh/codegen-sdk/releases/tag/v0.54.1)
+- Fix undefined field type bug
+</Update>
+
 <Update label="v0.54.0" description="April 08, 2025">
 ### [Introduces new API client feature](https://github.com/codegen-sh/codegen-sdk/releases/tag/v0.54.0)
 - Add API client feature