Prepare v2.0.39 changelog

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: kvz

CHANGELOG.md

@@ -62,7 +62,11 @@ Ideas that will be planned and find their way into a release at one point
 
 ## main
 
-Released: TBA. [Diff](https://github.com/locutusjs/locutus/compare/v2.0.38...main).
+Released: TBA. [Diff](https://github.com/locutusjs/locutus/compare/v2.0.39...main).
+
+## v2.0.39
+
+Released: 2026-02-02. [Diff](https://github.com/locutusjs/locutus/compare/v2.0.38...v2.0.39).
 
 ### Security
 - Fix prototype pollution bypass in `parse_str` where overriding `String.prototype.includes` could defeat the guard ([GHSA-rxrv-835q-v5mh](https://github.com/locutusjs/locutus/security/advisories/GHSA-rxrv-835q-v5mh))