Pro-Changes.md in sidekiq-6.1.2 vs Pro-Changes.md in sidekiq-6.1.3

@@ -2,9 +2,17 @@
 
 [Sidekiq Changes](https://github.com/mperham/sidekiq/blob/master/Changes.md) | [Sidekiq Pro Changes](https://github.com/mperham/sidekiq/blob/master/Pro-Changes.md) | [Sidekiq Enterprise Changes](https://github.com/mperham/sidekiq/blob/master/Ent-Changes.md)
 
 Please see [sidekiq.org](https://sidekiq.org/) for more details and how to buy.
 
+5.2.1
+---------
+
+- Propagate death callbacks to parent batches [#4774]
+- Allow customization of Batch linger to quickly reclaim memory in Redis [#4772]
+- Fix disappearing processes in Busy due to super_fetch initialization when used in
+  tandem with `SIDEKIQ_PRELOAD_APP=1` in `sidekiqswarm`. [#4733]
+
 5.2.0
 ---------
 
 - The Sidekiq Pro and Enterprise gem servers now `bundle install` much faster with **Bundler 2.2+** [#4158]
 - Fix issue with reliable push and multiple shards [#4669]