message: Move BR2 description to 4.2.1 section
diff: @@ -20,6 +20,9 @@ Version 4.2.1 (development)
  - Added a "scaled Jacobian" visualization option in the Mesh Explorer miniapp to
  help identify elements with poor mesh quality.
  +- Added support for the "BR2" discontinuous Galerkin discretization for
  + diffusion via DGDiffusionBR2Integrator (see Example 14/14p).
  +
  - Upgraded the Catch unit test framework from version 2.13.0 to version 2.13.2.
  - Implemented a filter method for the Navier miniapp to stabilize highly
  @@ -123,9 +126,6 @@ Discretization improvements
  - Extended GSLIB-FindPoints integration to support simplices and interpolation
  of functions from L2, H(div) and H(curl) spaces.
  -- Added support for the "BR2" discontinuous Galerkin discretization for
  - diffusion via DGDiffusionBR2Integrator (see Example 14/14p).
  -
  - Added support for computing asymptotic error estimates and convergence rates
  for the whole de Rham sequence based on the new class ConvergenceStudy and new
  member methods in GridFunction and ParGridFunction. See the rates.cpp file in
  