[Compose] Update watchdog image

docker-compose.yml

@@ -330,7 +330,7 @@ services:
         - /lib/modules:/lib/modules:ro
 
     watchdog-mailcow:
-      image: mailcow/watchdog:1.21
+      image: mailcow/watchdog:1.22
       # Debug
       #command: /watchdog.sh
       build: ./data/Dockerfiles/watchdog