message: update module doc
diff: -//! This module contains the constant evaluations
  -//! for domain d4 and d8
  +//! This contains the [DomainConstantEvaluations] which is used to provide precomputations to a [ConstraintSystem].
  use crate::circuits::domains::EvaluationDomains;
  use crate::circuits::polynomials::permutation::zk_polynomial;
  