HYPERFLEET-1017 - fix: clarify changelog version section wording in CLAUDE.md

Author: rafabene

CLAUDE.md

@@ -192,7 +192,7 @@ Build: `npm run build:gcp`
 
 When bumping the version in `main.tsp`, always update `CHANGELOG.md`:
 
-1. Add a new section under `## [Unreleased]` with the new version and today's date
+1. Keep `## [Unreleased]` at the top, then add a new version section as `## [X.Y.Z] - YYYY-MM-DD`
 2. List changes under appropriate headings (`Added`, `Changed`, `Fixed`, `Removed`)
 3. Update the comparison links at the bottom of the file
 4. Follow [Keep a Changelog](https://keepachangelog.com/en/1.1.0/) format