fix: RecommendedPostResponse dto 수정

- id 필드 추가

#1397

backend/src/main/java/wooteco/prolog/roadmap/application/dto/RecommendedPostResponse.java

@@ -1,18 +1,17 @@
 package wooteco.prolog.roadmap.application.dto;
 
+import lombok.AllArgsConstructor;
 import lombok.Getter;
 import wooteco.prolog.roadmap.domain.RecommendedPost;
 
+@AllArgsConstructor
 @Getter
 public class RecommendedPostResponse {
 
+    private final Long id;
     private final String url;
 
-    public RecommendedPostResponse(final String url) {
-        this.url = url;
-    }
-
     public static RecommendedPostResponse from(final RecommendedPost recommendedPost) {
-        return new RecommendedPostResponse(recommendedPost.getUrl());
+        return new RecommendedPostResponse(recommendedPost.getId(), recommendedPost.getUrl());
     }
 }