Edit: Please read this child comment, where I describe how I am technically wrong.
Well, it's now on the record that those who Guiliani defamed were not involved in any "election rigging" in Georgia. That's different from "the election in Georgia was not rigged" (even if that statement is also true).
This ruling certainly eliminates some of the claimed "evidence" of "election rigging" that is being claimed. They continue to claim that other evidence exists, without producing said evidence, of course.