fix cms upload journal image with content-type

luoo_music/src/main/java/com/luoo/music/service/S3Service.java

@@ -151,6 +151,7 @@ public class S3Service {
         try {
             PutObjectRequest putObjectRequest = PutObjectRequest.builder()
                     .bucket(bucket)
+                    .contentType(file.getContentType())
                     .key(key)
                     .build();
             RequestBody requestBody = RequestBody.fromInputStream(file.getInputStream(), file.getSize());