fix: [stix2 export] Fixed vulnerability export
fix: [stix2 export] Fixed vulnerability export

- depending on the origin of the object exported:
  attribute/object or galaxy

devnull-/MISP,FloatingGhost/MISP,FIRSTdotorg/MISP,FloatingGhost/MISP,devnull-/MISP,MISP/MISP,SteveClement/MISP,SteveClement/MISP,FIRSTdotorg/MISP,SteveClement/MISP,MISP/MISP,MISP/MISP,FloatingGhost/MISP,MISP/MISP,Rafiot/MISP,Rafiot/MISP,SteveClement/MISP,devnull-/MISP,FIRSTdotorg/MISP,SteveClement/MISP,Rafiot/MISP,MISP/MISP,FIRSTdotorg/MISP,Rafiot/MISP,devnull-/MISP,FloatingGhost/MISP