update changelog

Author: github-actions[bot]

docs/changelog/changelog.mdx

@@ -4,6 +4,11 @@ icon: "clock"
 iconType: "solid"
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+<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
+</Update>
+
 <Update label="v0.48.5" description="March 09, 2025">
 ### [Adds dataset subsets and improves CLI arguments.](https://github.com/codegen-sh/codegen-sdk/releases/tag/v0.48.5)
 - Updated OpenAI dependency