Fix outdated backend service tests

src/modules/comments/comments.service.spec.ts

@@ -41,6 +41,9 @@ describe('CommentsService', () => {
     const usersRepository = {
       findByUsernames: jest.fn().mockResolvedValue([{ id: 'mentioned-user-id', username: 'new_mention' }]),
     };
+    const followsRepository = {
+      findOne: jest.fn(),
+    };
 
     const service = new CommentsService(
       commentsRepository as any,
@@ -49,6 +52,7 @@ describe('CommentsService', () => {
       feedVersionService as any,
       notificationsService as any,
       usersRepository as any,
+      followsRepository as any,
     );
 
     const result = await service.update(userId, commentId, {