[Compose] Update Netfilter Image to 1.46

docker-compose.yml

@@ -420,7 +420,7 @@ services:
             - acme
 
     netfilter-mailcow:
-      image: mailcow/netfilter:1.45
+      image: mailcow/netfilter:1.46
       stop_grace_period: 30s
       depends_on:
         - dovecot-mailcow