Update upgrade with install_zabbix_repo repo

scripts/upgrade

@@ -114,9 +114,7 @@ fi
 #patch if zabbix-release installed
 if [ "$(dpkg -l zabbix-release 2>/dev/null | wc -l)" -ne 0 ];then
     DEBIAN_FRONTEND=noninteractive apt purge zabbix-release -y
-    ynh_add_extra_apt_repos__3_path=$(find /var/cache/yunohost/ -name "ynh_add_extra_apt_repos__3")
-    source "$ynh_add_extra_apt_repos__3_path"
-    ynh_install_extra_repo --repo="http://repo.zabbix.com/zabbix/4.2/debian $(lsb_release -sc) main" --key=https://repo.zabbix.com/zabbix-official-repo.key  --priority=999  --name=zabbix 
+    install_zabbix_repo
 fi
 
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