Merge pull request #1571 from QYG2297248353/renovate/mailserver-docker-mailserver-15.x

Update mailserver/docker-mailserver Docker tag to v15.0.1

apps/mailserver/15.0.1/docker-compose.yml

@@ -4,7 +4,7 @@ networks:
 
 services:
   mailserver:
-    image: mailserver/docker-mailserver:15.0.0
+    image: mailserver/docker-mailserver:15.0.1
     container_name: ${CONTAINER_NAME}
     labels:
       createdBy: "Apps"