fix: [shodan] Fixed wrong asset used to add attribute to

- This caused the input `ip-src` or `ip-dst` input
  attribute to be added to the `ip-api-addres`
  which does not have these attributes in their
  template, where they should be added to the
  Event instead

misp_modules/modules/expansion/shodan.py

@@ -73,7 +73,7 @@ class ShodanParser():
             ip_address_object = MISPObject('ip-api-address')
             for attribute in ip_address_attributes:
                 ip_address_object.add_attribute(**attribute)
-            ip_address_object.add_attribute(**self._get_source_attribute())
+            self.misp_event.add_attribute(**self._get_source_attribute())
             ip_address_object.add_reference(self.attribute.uuid, 'describes')
             self.misp_event.add_object(ip_address_object)