update.sh: added silent fix for removing old fts.conf in order to upd… #673

Job	Run time
docker_image_builds (acme-mailcow)	50s
docker_image_builds (clamd-mailcow)	53s
docker_image_builds (dockerapi-mailcow)	1m 0s
docker_image_builds (dovecot-mailcow)	1m 3s
docker_image_builds (netfilter-mailcow)	57s
docker_image_builds (olefy-mailcow)	1m 9s
docker_image_builds (php-fpm-mailcow)	4m 6s
docker_image_builds (postfix-mailcow)	1m 16s
docker_image_builds (rspamd-mailcow)	1m 7s
docker_image_builds (sogo-mailcow)	1m 16s
docker_image_builds (unbound-mailcow)	2m 1s
docker_image_builds (watchdog-mailcow)	53s
	16m 31s

Provide feedback