Update CHANGELOG.md (#7606)

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

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

CHANGELOG.md

@@ -26,6 +26,7 @@ Exercise vigilance regarding copycat or coat-tailing sites that seek to exploit
 
   - #### ✨ New Features
 
+    - [core]: add fallback if mariadb upstream unreachable [@MickLesk](https://github.com/MickLesk) ([#7599](https://github.com/community-scripts/ProxmoxVE/pull/7599))
     - ESPHome: Increase default disk size [@tremor021](https://github.com/tremor021) ([#7600](https://github.com/community-scripts/ProxmoxVE/pull/7600))
 
 ## 2025-09-11