message: DOC: document renaming of CMake options
  Document renaming of the CMake options in the release notes.
diff: @@ -46,6 +46,8 @@ The Axom project release numbers follow [Semantic Versioning](http://semver.org/
  ### Deprecated
  ### Changed
  +- Renamed the `AXOM_USE_MPI3`option to `AXOM_ENABLE_MPI3` for consistency.
  +- Renamed the `AXOM_USE_CUB` option to `AXOM_ENABLE_CUB` for consistency.
  - Modified the API for the BVH to accomodate different query types. The queries are now
  more explicitly called `BVH::findPoints()` and `BVH::findRays()`.
  - Modified the API of Axom's memory management routines to not leak usage of Umpire. Instead of
  