Update java/food-ordering/app/restate-app/src/main/java/dev/restate/s…

…dk/examples/DeliveryManager.java

Co-authored-by: Francesco Guardiani <[email protected]>

java/food-ordering/app/restate-app/src/main/java/dev/restate/sdk/examples/DeliveryManager.java

@@ -25,7 +25,7 @@
 public class DeliveryManager extends DeliveryManagerRestate.DeliveryManagerRestateImplBase {
 
   // State key to store all relevant information about the delivery.
-  StateKey<DeliveryInformation> DELIVERY_INFO =
+  private static final StateKey<DeliveryInformation> DELIVERY_INFO =
       StateKey.of("delivery-info", JacksonSerdes.of(DeliveryInformation.class));
 
   private static final Serde<Location> locationSerde = JacksonSerdes.of(Location.class);