fix: remove deprecated compose version tag

examples/guacamole/docker-compose.yml

@@ -1,5 +1,3 @@
-version: '2.0'
-
 services:
 
   guacd:
@@ -16,6 +14,8 @@ services:
     image: postgres:16-alpine
     container_name: guacamole-db
     restart: always
+    expose:
+      - 5432
     environment:
       - PGDATA=/var/lib/postgresql/data/guacamole
       - POSTGRES_DB=guacamole_db
@@ -27,7 +27,6 @@ services:
     #networks:
     #  - proxy
 
-  # guacamole
   guacamole:
     image: guacamole/guacamole
     container_name: guacamole-ui