Update admin integration information in README.md

Author: selwin

README.md

@@ -79,7 +79,7 @@ RQ_EXCEPTION_HANDLERS = ['path.to.my.handler']  # If you need custom exception h
 
 ## Admin Integration
 
-_Changed in Version 3.0_
+_New in Version 4.0_ (not released)
 Django-RQ automatically integrates with Django's admin interface. Once installed, navigate to `/admin/django_rq/dashboard/` to access:
 - Queue statistics and monitoring dashboard
 - Job registry browsers (scheduled, started, finished, failed, deferred)