v1.32.1 Changelog (#4453)

* Update CHANGELOG.md

* Update CHANGELOG.md

CHANGELOG.md

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 # Mattermost Mobile Apps Changelog
 
+## 1.32.1 Release
+- Release Date: June 25, 2020
+- Server Versions Supported: Server v5.19+ is required, Self-Signed SSL Certificates are not supported unless the user installs the CA certificate on their device
+
+### Compatibility
+ - **Upgrade to server version v5.19 or later is required.** Support for server [Extended Support Release](https://docs.mattermost.com/administration/extended-support-release.html) (ESR) 5.9 has ended and upgrading to server ESR v5.19 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. See [this blog post](https://mattermost.com/blog/support-for-esr-5-9-has-ended/) for more details.
+ - 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 11+ is required.
+
+### Bug Fixes
+ - Fixed an issue where Android app cold start and channel switching were slow.
+ 
 ## 1.32.0 Release
 - Release Date: June 16, 2020
 - Server Versions Supported: Server v5.19+ is required, Self-Signed SSL Certificates are not supported unless the user installs the CA certificate on their device