Update container name.

Because Docker Compose changed from using underscores to hyphens in the
containers name.

crond/backup

@@ -10,7 +10,7 @@ set -eu
 # maintenance window is short as possible. Backups as saved under /var/backups
 # which should be a Docker volume.
 
-alias nc_run='docker exec -u www-data nextcloud_nextcloud_1'
+alias nc_run='docker exec -u www-data nextcloud-nextcloud-1'
 alias db_run='docker exec -u nobody nextcloud_mysql_1'
 
 cleanup () {

crond/crontab

-*/5  *  *  *  * docker exec -u www-data nextcloud_nextcloud_1 php /var/www/html/cron.php || wget --spider https://notify.shore.co.il/send?message=Nextcloud%20cron%20failed.
+*/5  *  *  *  * docker exec -u www-data nextcloud-nextcloud-1 php /var/www/html/cron.php || wget --spider https://notify.shore.co.il/send?message=Nextcloud%20cron%20failed.
 @weekly backup || wget --spider https://notify.shore.co.il/send?message=Nextcloud%20backup%20failed.
 @daily find /var/backups -atime +18 -delete

crond/restore

@@ -3,7 +3,7 @@ set -eux
 
 src="$1"
 
-alias nc_run='docker exec -iu www-data nextcloud_nextcloud_1'
+alias nc_run='docker exec -iu www-data nextcloud-nextcloud-1'
 alias db_run='docker exec -iu nobody nextcloud_mysql_1'
 
 nc_run php occ maintenance:mode --on