fix(examples): volumes must match (insecure-mariadb-apache)

Signed-off-by: Josh <josh.t.richards@gmail.com>

.examples/docker-compose/insecure/mariadb/apache/compose.yaml

@@ -23,6 +23,7 @@ services:
       - 127.0.0.1:8080:80
     volumes:
       - nextcloud:/var/www/html:z
+      # NOTE: The `volumes` config of the `cron` and `app` containers must match
     environment:
       - MYSQL_HOST=db
       - REDIS_HOST=redis
@@ -37,6 +38,7 @@ services:
     restart: always
     volumes:
       - nextcloud:/var/www/html:z
+      # NOTE: The `volumes` config of the `cron` and `app` containers must match
     entrypoint: /cron.sh
     depends_on:
       - db