g2: add maintainers and version 3.4.5 (#26105)
g2: add maintainers and version 3.4.5 (#26105)

* added new release, added noaa software maintainers to maintainer list

* updated comment

* removed trailing whitespace
LLNL/spack,LLNL/spack,LLNL/spack,LLNL/spack,LLNL/spack