Re: typos in convertrules.py

[Werner LEMBERG]

> L 5476: UnisonoEvent, SoloOneEvent, and UnisonoEvent
>   -> UnisonoEvent, SoloOneEvent, and SoloTwoEvent
> 
> L 5484: unisono-event, solo-one-event, and unisono-event
>   -> unisono-event, solo-one-event, and solo-two-event

Thanks.

  https://gitlab.com/lilypond/lilypond/-/merge_requests/3011


     Werner