Update CHANGELOG.md (#928)

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 @@ Do not break established syntax in this file, as it is automatically updated by
 
 ### 🚀 Updated Scripts
 
+- Fix: Bookstack Update Function [@michelroegl-brunner](https://github.com/michelroegl-brunner) ([#844](https://github.com/community-scripts/ProxmoxVE/pull/844))
 - mysql not showing ip after install [@snow2k9](https://github.com/snow2k9) ([#924](https://github.com/community-scripts/ProxmoxVE/pull/924))
 - Fix Omada - Crawling latest version [@MickLesk](https://github.com/MickLesk) ([#918](https://github.com/community-scripts/ProxmoxVE/pull/918))