bug_report.md in sidekiq-unique-jobs-6.0.0.rc7

- old
+ new

@@ -16,10 +16,10 @@
 **Worker class**
 
 ```ruby
 class MyWorker
   include Sidekiq::Worker
-  sidekiq_options unique: :until_executed, queue: :undefault
+  sidekiq_options lock: :until_executed, queue: :undefault
   def perform(args); end
 
   def self.unique_args(args)
     # the way you consider unique arguments
   end