Changes to Create a task

the code response's property type changed from string to no type for status 400

added subschema #1 subschema #2 to the code response property anyOf list for the response status 400

removed the validation_type enum value from the code response property for the response status 400

added subschema #1 subschema #2 to the data/linked_records request property anyOf list

added the required property data/completed_at to the response with the 200 status

the data/content request property's maxLength was set to 2000

added the new AC enum value to the request property data/linked_records/items/anyOf[subschema #2]/[slug_or_id_of_matching_attribute]/items/anyOf[subschema #4]/country_code

added the new XK enum value to the request property data/linked_records/items/anyOf[subschema #2]/[slug_or_id_of_matching_attribute]/items/anyOf[subschema #4]/country_code