petsc: add in maintainers (#5729)
petsc: add in maintainers (#5729)


EmreAtes/spack,iulian787/spack,matthiasdiener/spack,mfherbst/spack,skosukhin/spack,skosukhin/spack,tmerrick1/spack,EmreAtes/spack,LLNL/spack,krafczyk/spack,tmerrick1/spack,iulian787/spack,LLNL/spack,mfherbst/spack,lgarren/spack,iulian787/spack,skosukhin/spack,skosukhin/spack,LLNL/spack,krafczyk/spack,iulian787/spack,EmreAtes/spack,mfherbst/spack,LLNL/spack,krafczyk/spack,lgarren/spack,tmerrick1/spack,lgarren/spack,EmreAtes/spack,lgarren/spack,iulian787/spack,tmerrick1/spack,lgarren/spack,mfherbst/spack,skosukhin/spack,tmerrick1/spack,LLNL/spack,matthiasdiener/spack,matthiasdiener/spack,mfherbst/spack,krafczyk/spack,EmreAtes/spack,matthiasdiener/spack,matthiasdiener/spack,krafczyk/spack