Mobile v2.12.2 changelog (#6891)

* Update mobile-app-changelog.md

* Update mobile-app-changelog.md

* Update mobile-app-changelog.md

source/deploy/mobile-app-changelog.md

@@ -5,6 +5,18 @@ This changelog summarizes updates to Mattermost mobile apps releases for [Matter
 ```{contents} On this page
 :depth: 2
 ```
+## 2.12.2 Release
+ - Release Date: February 5, 2024
+ - Server Versions Supported: Server v8.1.0+ is required. Self-Signed SSL Certificates are not supported unless the user installs the CA certificate on their device.
+
+### Compatibility
+ - **Upgrade to server version v8.1.0 or later is required.** Support for server [Extended Support Release](https://docs.mattermost.com/upgrade/extended-support-release.html) (ESR) v7.8.0 has ended and upgrading to server ESR v8.1.0 or later is required. As we innovate and offer newer versions of our mobile apps, we maintain backwards compatibility only with supported server versions. Users who upgrade to the newest mobile apps while being connected to an unsupported server version can be exposed to compatibility issues, which can cause crashes or severe bugs that break core functionality of the app.
+ - Android operating system 7+ [is required by Google](https://android-developers.googleblog.com/2017/12/improving-app-security-and-performance.html).	
+ - iPhone 5s devices and later with iOS 12.4+ is required.
+
+### Bug Fixes
+ - Fixed an issue with HTTP connections on iOS that were previously removed.
+ - Updated the purpose message for permissions on iOS.
 
 ## 2.12.1 Release
  - Release Date: January 30, 2024