Update nextcloud Docker tag to v28.0.6

docker-compose.yml

@@ -14,7 +14,7 @@ services:
     restart: always
 
   app:
-    image: nextcloud:29.0.1-fpm-alpine
+    image: nextcloud:28.0.6-fpm-alpine
 #    ports:
 #     - 8080:80
     restart: always
@@ -49,7 +49,7 @@ services:
       - app
 
   cron:
-    image: nextcloud:29.0.1-fpm-alpine
+    image: nextcloud:28.0.6-fpm-alpine
     restart: always
     volumes:
       - nextcloud:/var/www/html