fix: [stix1 import] Fixed missing self argument
fix: [stix1 import] Fixed missing self argument

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