Changes to List webhooks

the response property data/items/suppressed_at became nullable for the status 200

the response property data became required for the status 200

the response property data/items/id became required for the status 200

the response property data/items/suppressed_at became required for the status 200

the response property data/items/url became required for the status 200

the response property data became optional for the status 200

the response property data/items/id became optional for the status 200

the response property data/items/suppressed_at became optional for the status 200

the response property data/items/url became optional for the status 200