Redoing with headline

[adaptedbee]

Description

1. Add headline
2. Press Ctrl+Z (headline removes)
3. Press Ctrl+Y

Environment

• Editor.js version: 2.30.8
• Plugins you use with their versions: editorjs-undo 2.0.28
• Device, Browser, OS: Desktop, Google Chrome 138.0.7204.168, Windows 10

Current behavior

Text returns as paragraph, not headline

Expected behavior

Headline returns