fix: Fix KeyboardAcceleratorCopyConverter using the wrong type

[Youssef1313]

GitHub Issue (If applicable): closes #

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Internal Issue (If applicable):

[unodevops]

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[github-actions[bot]]

This PR is stale because it has been open 60 days with no activity. Remove stale label or comment or it will be closed in 10 days.

[MartinZikmund]

I think this can be closed, as I will be fixing it in https://github.com/unoplatform/uno/pull/17228, which is a client issue, so it will be prioritized soon