chore: update CHANGELOG to reflect behavior change in filterByFilepaths

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: brendan-kellam

packages/mcp/CHANGELOG.md

@@ -8,7 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Changed
-- Clarified that `filterByFilepaths` in the `search_code` tool accepts regular expressions matched against the full file path. [#1008](https://github.com/sourcebot-dev/sourcebot/pull/1008)
+- `filterByFilepaths` in the `search_code` tool now accepts regular expressions matched against the full file path, instead of treating values as escaped literals. [#1008](https://github.com/sourcebot-dev/sourcebot/pull/1008)
 
 ## [1.0.18] - 2026-02-28