man: fix typos in MPI_Win_{attach,detach}#6406

hppritcha merged 2 commits intoopen-mpi:v3.0.xopen-mpi/ompi:v3.0.xfrom

ggouaillardet:topic/v3.0.x/man_win_attach_detachggouaillardet/ompi:topic/v3.0.x/man_win_attach_detachCopy head branch name to clipboard