chg: [stix2 export] Using a specific filter to specify the STIX version
chg: [stix2 export] Using a specific filter to specify the STIX version

- `version` being too generic and used from another
  end point, we use `stix-version` in order to
  avoid confusion between the 2 filters

MISP/MISP,SteveClement/MISP,SteveClement/MISP,MISP/MISP,MISP/MISP,SteveClement/MISP,SteveClement/MISP,SteveClement/MISP,MISP/MISP,MISP/MISP