Skill follow-up: release-tagging-plan

## Summary
Address the follow-up actions for the release-tagging-plan skill as identified in the skills review.

## Acceptance Criteria
- [ ] Add sample tag commands and changelog linkage examples.

## Scope
- Applies to `skills/release-tagging-plan/`
- Derived from skills-review.md (commit 9c59dbc)

## Parent
- Refs: #297
