[Bug] Fixes small bug in shipping bundle

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Fixed tickets | -
| License       | MIT

Wrong default configuration. The model `Shipping` does not exist, I think it was meant to be the model `Shipment`. This PR fixes it :)