correct table name in schema for add_reference migration in Active Record Migration Documentation [ci skip]

Author: sampatbadhe

guides/source/active_record_migrations.md

@@ -277,7 +277,7 @@ table, where `user_id` is a reference to the `id` column in the `users` table.
 It also creates an index for the `user_id` column. The schema looks as follows:
 
 ```ruby
-  create_table "users", force: :cascade do |t|
+  create_table "products", force: :cascade do |t|
     t.bigint "user_id", null: false
     t.index ["user_id"], name: "index_products_on_user_id"
   end