heffte: fix conflict directive (missing '^') (#19749)
heffte: fix conflict directive (missing '^') (#19749)


LLNL/spack,iulian787/spack,iulian787/spack,iulian787/spack,LLNL/spack,iulian787/spack,LLNL/spack,LLNL/spack,LLNL/spack,iulian787/spack