Preparing for next development iteration, 2.2.2.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: dblock

CHANGELOG.md

@@ -1,5 +1,9 @@
 ### Changelog
 
+### 2.2.2 (Next)
+
+* Your contribution here.
+
 ### 2.2.1 (2026/10/24)
 
 * [#182](https://github.com/slack-ruby/slack-ruby-bot-server/pull/182): Modernize CI with current actions, native database services, dependency caching, and explicit Ruby 4, Mongoid 9, Active Record 8.1, PostgreSQL 18, Grape 3/4, and JSON 2/3 coverage while retaining existing compatibility combinations - [@dblock](https://github.com/dblock), [@Copilot](https://github.com/apps/copilot-swe-agent).

README.md

@@ -37,7 +37,7 @@ A library that contains a web server and a RESTful [Grape](http://github.com/rub
 
 ## Stable Release
 
-You're reading the documentation for the **stable** release of slack-ruby-bot-server, 2.2.1. See [UPGRADING](UPGRADING.md) when upgrading from an older version. See [MIGRATING](MIGRATING.md) for help with migrating Legacy Slack Apps to Granular Scopes.
+You're reading the documentation for the **next** release of slack-ruby-bot-server. Please see the documentation for the [last stable release, v2.2.1](https://github.com/slack-ruby/slack-ruby-bot-server/blob/v2.2.1/README.md) unless you're integrating with HEAD. See [UPGRADING](UPGRADING.md) when upgrading from an older version. See [MIGRATING](MIGRATING.md) for help with migrating Legacy Slack Apps to Granular Scopes.
 
 ## Make Your Own
 

lib/slack-ruby-bot-server/version.rb

@@ -1,3 +1,3 @@
 module SlackRubyBotServer
-  VERSION = '2.2.1'.freeze
+  VERSION = '2.2.2'.freeze
 end