Add mention in react-admin dataproviders doc about ra-data-opencrud

[Weakky]

Hey there,

That provider is already in your documentation, I just changed the name of repository because ra-data-prisma was already taken, but the link is still working.

If you look closely, there's already Prisma: weakky/ra-data-prisma listed.
I just need to send a PR to rename the repository name ! I'll try to find time to do that in the coming days. I'll leave the issue opened until I do it so I don't forget about it.

Thanks Francois 🙏

[Weakky]

Actually, do you think it'd be fine to keep using ra-data-prisma as name on your documentation?

I was constrained to use ra-data-opencrud because ra-data-prisma was already taken. I think it's gonna mislead people with the name ra-data-opencrud because it is not yet a well known spec.

[fzaninotto]

right, if you can keep the prisma title, it's better