fix up blurb about libmpi_abi versioning

in the VERSION file as this is the file updated
by the OMPI release managers.

Signed-off-by: Howard Pritchard <[email protected]>

Author: hppritcha

VERSION

@@ -20,7 +20,7 @@ minor=1
 release=0
 
 # MPI Standard Compliance Level
-mpi_standard_version=3
+mpi_standard_version=5
 mpi_standard_subversion=1
 
 # OMPI required dependency versions.
@@ -92,10 +92,12 @@ date="Unreleased developer copy"
 # but they are "public" within the OMPI code base and select 3rd party
 # software packages.
 
-# The current and age values of the libmpi_abi shared library are defined by the
-# specification of the ABI for the version of the MPI standard supported
-# by this Open MPI release.  One would hope that these always move in
-# sync.  We assume we have flexibility with the revision number as
+# The current and age values of the libmpi_abi shared library are
+# implicitly determined by the MPI ABI definition of the
+# version of the MPI specification supported by this Open MPI release.
+# The MPI ABI is intended not to break backward compatibility,
+# so presumably the current and age values will move in lock step.
+# We assume we have flexibility with the revision number as
 # bugs are fixed, etc.
 
 # Version numbers are described in the Libtool current:revision:age