Add rsyslog as dependency for Ubuntu

It get installed on Debian 
https://github.com/hestiacp/hestiacp/blob/1c8b770d5216588bcc1fe0adc4a663a68ae57b8b/install/hst-install-debian.sh#L73

Author: jaapmarcus

install/hst-install-ubuntu.sh

@@ -52,7 +52,7 @@ software="apache2 apache2.2-common apache2-suexec-custom apache2-utils
     php$fpm_v-imagick php$fpm_v-intl php$fpm_v-mbstring
     php$fpm_v-opcache php$fpm_v-pspell php$fpm_v-readline php$fpm_v-xml
     postgresql postgresql-contrib proftpd-basic quota rrdtool rssh spamassassin sudo hestia=${HESTIA_INSTALL_VER}
-    hestia-nginx hestia-php vim-common vsftpd whois unzip zip acl sysstat setpriv
+    hestia-nginx hestia-php vim-common vsftpd whois unzip zip acl sysstat setpriv rsyslog
     ipset libonig5 libzip5 openssh-server lsb-release zstd"
 
 installer_dependencies="apt-transport-https curl dirmngr gnupg wget software-properties-common ca-certificates"