Change relation() to use the new ofMany

[quintenbuis]

This PR changes the translation() relation to the new ofMany method and fixes #275

[Gummibeer]

Thanks! 🎉
Looking good. :)

[Gummibeer]

https://github.com/Astrotomic/laravel-translatable/releases/tag/v11.11.0

[Lambutty]

This change produces awfull performance for me.
Project Laravel 11 . Maria DB 11.
Execution time went from under 1 second to over 30 seconds.
When calling Article::with(['translation','a lot more relationships here']); .
This issues is only present in Maria DB 11.x. Every older version doesnt seem to be affected.
I dont know why and it already cost a lot of debugging time to find the source of the problem.
Anyways have a nice one.