Update changelog

Author: albin-mullvad

android/CHANGELOG.md

@@ -29,6 +29,7 @@ Line wrap the file at 100 chars.                                              Th
 ### Security
 - Fix DNS leaks in blocking states or when no valid DNS has been configured due to an underlying OS
   issue. In these cases a dummy DNS will be set to prevent leaks.
+- Clarify lockdown limitations in the in-app guide.
 
 
 ## [android/2024.2-beta1] - 2024-04-17