message: Add release notes comment about SPIO changes.
diff: @@ -21,6 +21,9 @@ The Axom project release numbers follow [Semantic Versioning](http://semver.org/
  - Added support for face data and face connectivity in the mint StructuredMesh classes.
  - Added Python module for Quest signed distance interface.
  See the file src/axom/quest/interface/python/README.md for more information.
  +- Added capability in sidre IOManager to read files while running on a number
  + of MPI ranks greater than the number of ranks that were used to create
  + the files.
  ### Removed
  - Moved mint::Array to axom::Array with sidre storage in sidre::Array;
  