message: Update CHANGELOG to mention LOR GridFunction coefficient support
diff: @@ -110,6 +110,9 @@ Discretization improvements
  - Added support for nonscalar coefficient with VectorDiffusionIntegrator.
  +- GridFunctionCoefficient (and the related vector, gradient, divergence, and curl classes)
  + now work properly with LORDiscretization and LORSolver.
  +
  Linear and nonlinear solvers
  ----------------------------
  - Added support for AMG preconditioners on GPUs based on the hypre library
  