Fix error on create bookmark for topic

app/controllers/topics_controller.rb

@@ -551,7 +551,7 @@ class TopicsController < ApplicationController
       bookmark_manager = BookmarkManager.new(current_user)
       bookmark_manager.create(post_id: first_post.id)
 
-      if bookmark_manager.errors
+      if bookmark_manager.errors.any?
         return render_json_error(bookmark_manager, status: 400)
       end
     else

spec/requests/topics_controller_spec.rb

@@ -2376,6 +2376,7 @@ RSpec.describe TopicsController do
         post = create_post
         post2 = create_post(topic_id: post.topic_id)
         put "/t/#{post.topic_id}/bookmark.json"
+        expect(response.status).to eq(200)
 
         bookmarks_for_topic = Bookmark.where(topic: post.topic, user: user)
         expect(bookmarks_for_topic.count).to eq(1)