[Compose] New dovecot-mailcow image

docker-compose.yml

@@ -160,7 +160,7 @@ services:
             - sogo
 
     dovecot-mailcow:
-      image: mailcow/dovecot:1.37
+      image: mailcow/dovecot:1.38
       build: ./data/Dockerfiles/dovecot
       cap_add:
         - NET_BIND_SERVICE