IIASA-IAMC-*scenario*-0-4-0*-supplemental* (or whatever next version is)

[znichollscr]

@jkikstra small things we've picked up as we move to publication (I'll add as we go through the process, I've fixed these in 0.3.0 by hand to keep things moving)

• in the files, target_mip should be ScenarioMIP
  • this changes filenames from e.g. VOC14-toluene-em-speciated-VOC-anthro_input4MIPs_emissions_CMIP6plus_IIASA-IAMC-scendraft1-0-3-0_gn_202201-210012.nc to VOC14-toluene-em-speciated-VOC-anthro_input4MIPs_emissions_ScenarioMIP_IIASA-IAMC-scendraft1-0-3-0_gn_202201-210012.nc
• mip_era should be CMIP6Plus not CMIP6plus (i.e. lowercase p is wrong)