[Mpi-forum] MPI voting announcement

Hi all, I'm going to go ahead and announce the 2nd vote for the "side documents" proposal. Issue: https://github.com/mpi-forum/mpi-issues/issues/562 PR: https://github.com/mpi-forum/mpi-standard/pull/694 Changes since 1st vote: only chapter committee level tweaks. Best wishes, Dan.