Fix event name in x-load attribute

[quelo83]

This PR updates event name for modal opened (from ax-modal-opened to x-modal-opened)

[CodeWithDennis]

but Filament now has renamed it to "x-modal-opened" so the assets are never being loaded.

Do you know if this is also the case for v5? @quelo83

[quelo83]

Yes, I confirm that this is the same for v4 and v5 @CodeWithDennis

[CodeWithDennis]

Thanks!