message: Add Ginkgo expansion to CHANGELOG
diff: @@ -175,6 +175,10 @@ Version 4.2.1 (development)
  L2ProjectionGridTransfer operators. This functionality is illustrated in the
  lor-transfer miniapp.
  +- Improved interface for using the Ginkgo library, including: support for matrix-
  + free operators in Ginkgo solvers, new wrappers for Ginkgo preconditioners, HIP
  + support, and reduction of unnecessary data copies.
  +
  libCEED integration improvements
  --------------------------------
  - Refactor the libCEED integration
  