feat(ci): include non-conventional commits in changelog

[JasonXuDeveloper]

Summary

• Add "📦 Other Changes" section to capture commits that don't follow the conventional commit format
• Updates both GitHub release notes and CHANGE.md
• Conventional commits with types other than feat/fix (like chore, docs, etc.) remain excluded as intended

Why This Matters

Previously, commits like Fix build error handling... or Add JEngine.Util package were silently excluded from changelogs because they didn't follow the type(scope): message format. Now these commits will appear in the "Other Changes" section so no work is lost from release notes.

Example Output

With this change, the changelog would include:

### ✨ Features
- **ci**: add automated testing and release workflows

### 📦 Other Changes
- Fix build error handling and refactor Panel.cs
- Fix play mode test issues and refactor test code
- Add JEngine.Util package
- Update YooAsset samples to 2.3.18 and update dependencies
...

Test plan

• Verify the workflow syntax is valid
• Test with a dry run release to confirm changelog generation
• Confirm CHANGE.md is properly updated with Other Changes section

🤖 Generated with Claude Code

[claude]

Code review

No issues found. Checked for bugs and CLAUDE.md compliance.

[github-actions]

Unity Test Results

✅ EditMode: All tests passed
✅ PlayMode: All tests passed

Unity Version: 2022.3.55f1
Project Path: UnityProject

✅ All tests passed! The PR is ready for review.

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