fix(model): fix unchained promise in association logic in bulkCreate (#12163)

lib/model.js

@@ -2642,7 +2642,7 @@ class Model {
               const associationInstance = createdAssociationInstances[idx];
               const associationInstance = createdAssociationInstances[idx];
               const instance = associationInstanceIndexToInstanceMap[idx];
               const instance = associationInstanceIndexToInstanceMap[idx];
 
 
-              instance[include.association.accessors.set](associationInstance, { save: false, logging: options.logging });
+              await include.association.set(instance, associationInstance, { save: false, logging: options.logging });
             }
             }
           }));
           }));
         }
         }