chore(changelog): fix [Unreleased] template to match Keep a Changelog guideline

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

Author: nanotaboada

CHANGELOG.md

@@ -46,7 +46,9 @@ This project uses football/soccer terminology for release names:
 
 ### Changed
 
-### Deprecated
+### Fixed
+
+### Removed
 
 ## [2.1.0-dribble] - 2026-03-31