[fix] 작가 목록 조회 ID값 불일치 오류 해결 (#382)

Author: ahdeka

src/main/java/com/back/domain/artist/dto/response/ArtistListResponse.java

@@ -16,7 +16,7 @@ public record ArtistListResponse (
 ) {
         public static ArtistListResponse from(ArtistProfile artistProfile) {
             return new ArtistListResponse(
-                    artistProfile.getUser().getId(),
+                    artistProfile.getId(),
                     artistProfile.getArtistName()
             );
         }