Update CHANGELOG.md (#7547)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: community-scripts-pr-app[bot]

CHANGELOG.md

@@ -22,6 +22,7 @@ Exercise vigilance regarding copycat or coat-tailing sites that seek to exploit
 
   - #### ✨ New Features
 
+    - add external installer warnings and user confirmation in several LXC's [@MickLesk](https://github.com/MickLesk) ([#7539](https://github.com/community-scripts/ProxmoxVE/pull/7539))
     - Booklore: Add Bookdrop location to .env [@michelroegl-brunner](https://github.com/michelroegl-brunner) ([#7533](https://github.com/community-scripts/ProxmoxVE/pull/7533))
 
   - #### 🔧 Refactor