chore: updating version requirements for 8.3.0 release notes (#17556)

Add macos and ubuntu minimum versions to 8.3 release notes.

Author: emilyburghardt

app-shell/build/release-notes.md

@@ -12,6 +12,8 @@ By installing and using Opentrons software, you agree to the Opentrons End-User
 
 Welcome to the v8.3.0 release of the Opentrons App! This release adds support for Mandarin in the app or Flex touchscreen and includes other beta features for our commercial partners.
 
+Note: The Mac and Linux versions of the Opentrons App now require macOS 10.16 and Ubuntu 20.04 or newer.
+
 ### New Features
 
 - Change the app or Flex touchscreen language to Mandarin in Settings. This feature is only supported in app v8.3.0 or higher. If you need to downgrade your software version, first change the app language back to English in Settings.