docs(changelog): document --license-sources option for copyleft inspection

Author: isasmendiagus

CHANGELOG.md

@@ -7,7 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 ### Added
-- Upcoming changes...
+- Added `--license-sources` (`-ls`) to copyleft inspection for filtering by license source
 
 ## [1.40.1] - 2025-10-29
 ### Changed