Documentation update for container example (#17321)
Documentation update for container example (#17321)

This updates the documentation to reflect #17316.
iulian787/spack,LLNL/spack,iulian787/spack,LLNL/spack,LLNL/spack,iulian787/spack,iulian787/spack,LLNL/spack,iulian787/spack,LLNL/spack