Fix broken pipe error in reset-admin.sh

helper-scripts/mailcow-reset-admin.sh

@@ -19,7 +19,7 @@ read -r -p "Are you sure you want to reset the mailcow administrator account? [y
 response=${response,,}    # tolower
 if [[ "$response" =~ ^(yes|y)$ ]]; then
 	echo -e "\nWorking, please wait..."
-  random=$(</dev/urandom tr -dc _A-Z-a-z-0-9 | head -c${1:-16})
+  random=$(</dev/urandom tr -dc _A-Z-a-z-0-9 2> /dev/null | head -c${1:-16})
   password=$(docker exec -it $(docker ps -qf name=dovecot-mailcow) doveadm pw -s SSHA256 -p ${random} | tr -d '\r')
 	docker exec -it $(docker ps -qf name=mysql-mailcow) mysql -u${DBUSER} -p${DBPASS} ${DBNAME} -e "DELETE FROM admin WHERE username='admin';"
   docker exec -it $(docker ps -qf name=mysql-mailcow) mysql -u${DBUSER} -p${DBPASS} ${DBNAME} -e "DELETE FROM domain_admins WHERE username='admin';"