Added the release version

Author: agronholm

docs/versionhistory.rst

@@ -4,7 +4,7 @@ Version history
 To find out how to migrate your application from a previous version of
 APScheduler, see the :doc:`migration section <migration>`.
 
-**UNRELEASED**
+**3.11.1**
 
 - Fixed ``scheduler.shutdown()`` not raising ``SchedulerNotRunning`` (or raising the
   wrong exception) for asynchronous schedulers when the scheduler is in fact not running