fix more port typos

Author: michaelmcandrew

docker-compose.yml

@@ -32,7 +32,7 @@ services:
   phpmyadmin:
     image: phpmyadmin/phpmyadmin
     ports:
-      - "7981:80"
+      - "7891:80"
     links:
       - mysql
     environment:
@@ -44,7 +44,7 @@ services:
   maildev:
     image: djfarrelly/maildev
     ports:
-      - "7982:80"
+      - "7892:80"
     restart: unless-stopped
 
 volumes: