chore: update CHANGELOG for @ai-sdk/anthropic upgrade

Co-authored-by: Brendan Kellam <brendan-kellam@users.noreply.github.com>

Author: github-actions[bot]

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+- Upgraded `@ai-sdk/anthropic` to `^3.0.22` to support `ANTHROPIC_AUTH_TOKEN` environment variable. [#967](https://github.com/sourcebot-dev/sourcebot/pull/967)
+
 ## [4.13.1] - 2026-02-28
 
 ### Changed