Update CHANGELOG.md

Author: github-actions[bot]

CHANGELOG.md

@@ -16,6 +16,10 @@ Exercise vigilance regarding copycat or coat-tailing sites that seek to exploit
 
   - typo: tandoor instead of trandoor [@Neonize](https://github.com/Neonize) ([#9771](https://github.com/community-scripts/ProxmoxVE/pull/9771))
 
+  - #### ✨ New Features
+
+    - feat: Add var_gpu flag for GPU passthrough configuration [@MickLesk](https://github.com/MickLesk) ([#9764](https://github.com/community-scripts/ProxmoxVE/pull/9764))
+
 ## 2025-12-07
 
 ### 🚀 Updated Scripts