message: add release notes missed in last PR
diff: @@ -73,6 +73,9 @@ The Axom project release numbers follow [Semantic Versioning](http://semver.org/
  generates a Deluanay complex over the points and performs linear interpolation over the
  triangle/tetrahedron at the query points.
  - Adds a HIP execution policy for device kernels to run on AMD GPU hardware
  +- Adds new Slic macros that allow you to selectively print messages only on root ranks. For example,
  + `SLIC_ERROR_ROOT(msg)` and `SLIC_ERROR_ROOT_IF(EXP, msg)`. This can be set via
  + `slic::initialize(bool is_root = true)` or `slic::setIsRoot()`.
  ### Changed
  - Axom now requires C++14 and will default to that if not specified via `BLT_CXX_STD`.
  