Ent-Changes.md in sidekiq-4.1.1 vs Ent-Changes.md in sidekiq-4.1.2

@@ -1,9 +1,15 @@
 Sidekiq Enterprise Changelog
 =======================
 
 Please see [http://sidekiq.org/](http://sidekiq.org/) for more details and how to buy.
 
+HEAD
+-------------
+
+- Add API to check if a unique lock is present. See [#2932] for details.
+- Tune concurrent limiters to minimize thread thrashing under heavy contention. [#2944]
+
 1.2.1
 -------------
 
 - Multi-Process mode can now monitor the RSS memory of children and
   restart any that grow too large.  To limit children to 1GB each: