Update CHANGELOG.MD

CHANGELOG.MD

@@ -33,6 +33,8 @@ All notable changes to this project will be documented in this file.
   - New V3 Install Script 
 - **MQTT LXC**
   - New V3 Install Script 
+- **Mariadb LXC**
+  - New V3 Install Script 
 
 ## 2022-04-17