fix: remove deprecated compose version tag

examples/chevereto/docker-compose.yml

@@ -1,6 +1,5 @@
-version: "3.7"
-
 services:
+
   chevereto:
     image: ghcr.io/chevereto/chevereto:4.1
     container_name: chevereto
@@ -40,6 +39,8 @@ services:
     container_name: chevereto_mariadb
     restart: unless-stopped
     init: true
+    expose:
+      - 3306
     environment:
       MYSQL_DATABASE: chevereto
       MYSQL_USER: chevereto