bump, release

Author: mperham

Changes.md

@@ -2,6 +2,12 @@
 
 [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)
 
+5.2.9
+---------
+
+- Release Rack lock due to a cascade of CVEs. [#4566]
+  Pro-tip: don't lock Rack.
+
 5.2.8
 ---------
 

lib/sidekiq/version.rb

@@ -1,4 +1,4 @@
 # frozen_string_literal: true
 module Sidekiq
-  VERSION = "5.2.8"
+  VERSION = "5.2.9"
 end