Fix use of deprecated API in example

[TatuLund]

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[github-actions]

AI Language Review

The primary change in the MenuBarDividers file is the modification of the method used to add an Hr component. The new version uses addComponent(new Hr()), whereas the previous version used add(new Hr()).

• Ensure consistency in method usage. If the intended method to use for adding components within the context of a SubMenu is indeed addComponent(), verify that there are no overlooked reasons for this change in terms of framework updates or method deprecations.
• If addComponent() has specific advantages or is required for new functionality, it would be helpful to include a comment (if possible) explaining the change for clarity and future maintenance.

Make sure that this method call is necessary and intentional, as it deviates from the previously used call style.

[Copilot]

Pull Request Overview

This PR updates the example code to replace a deprecated add() call with the new addComponent() API.

• Replaced subMenu.add(new Hr()) with subMenu.addComponent(new Hr()) to avoid using the deprecated method.