Steps to reproduce:

1. Have 7.0 installed
2. Update to 7.2

Result:

1. These instructions are wrong for the Debian package.
2. The link at the bottom leads to https://www.zabbix.com/documentation/devel/en/manual/installation/upgrade_notes_720#frontend-file-directory-changed-during-package-installation which returns "This topic does not exist yet."

I suggest:

cp /etc/apache2/conf-available/zabbix.conf /etc/apache2/conf-available/zabbix.conf.bak

sed -i 's:/usr/share/zabbix:/usr/share/zabbix/ui:g' /etc/apache2/conf-available/zabbix.conf

systemctl restart apache2