chore: updates lesson_26 code to hint at ResponseEntity (#681)

* chore: adds hint for ResponseEntity

* chore: apply spotless

Author: anthonydmays

lesson_26/api/java/api_app/src/main/java/com/codedifferently/lesson26/web/MediaItemsController.java

@@ -7,13 +7,15 @@
 import java.io.IOException;
 import java.util.List;
 import java.util.Set;
+import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.CrossOrigin;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
 
 @RestController
 @CrossOrigin
 public class MediaItemsController {
+
   private final Library library;
   private final Librarian librarian;
 
@@ -23,10 +25,10 @@ public MediaItemsController(Library library) throws IOException {
   }
 
   @GetMapping("/items")
-  public GetMediaItemsResponse getItems() {
+  public ResponseEntity<GetMediaItemsResponse> getItems() {
     Set<MediaItem> items = library.search(SearchCriteria.builder().build());
     List<MediaItemResponse> responseItems = items.stream().map(MediaItemResponse::from).toList();
     var response = GetMediaItemsResponse.builder().items(responseItems).build();
-    return response;
+    return ResponseEntity.ok(response);
   }
 }