[Systems] Upgrading sunjammer to Ubuntu 20.04

[Bernie Innocenti]

Hello,

I'll be taking sunjammer down shortly a scheduled OS upgrade.

Services hosted on sunjammer, including wiki.sugarlabs.org and 
lists.sugarlabs.org will be unavailable until the update is complete.

During the procedure, I will be reachable on #sugar as bernie_.

-- 
Bernie Innocenti
Sugar Labs Infrastructure Team
http://wiki.sugarlabs.org/go/Infrastructure_Team