[PeerDAS] Rename ckzg4844 to ckzg

[jtraglia]

What type of PR is this?

Other

What does this PR do? Why is it needed?

This fixes a small nit. It feels wrong to have 4844 in the module name when using EIP-7594 functions.

I also think "ckzg" is just easier to read because I prefer shorter names.