update changelog

Author: github-actions[bot]

docs/changelog/changelog.mdx

@@ -4,6 +4,14 @@ icon: "clock"
 iconType: "solid"
 ---
 
+<Update label="v0.45.0" description="March 04, 2025">
+### [Improve performance and update documentation.](https://github.com/codegen-sh/codegen-sdk/releases/tag/v0.45.0)
+- Add runner tooling feature
+- Speed up directory tree generation
+- Remove unnecessary tools from agent implementation
+- Update API reference and fix documentation links
+</Update>
+
 <Update label="v0.44.4" description="March 03, 2025">
 ### [Fixes a Slack schema error.](https://github.com/codegen-sh/codegen-sdk/releases/tag/v0.44.4)
 - Fix Slack schema error