docs: Improve discussion of Ubuntu system updates.
docs: Improve discussion of Ubuntu system updates.

rishig/zulip,brockwhittaker/zulip,brainwane/zulip,dhcrzf/zulip,showell/zulip,Galexrt/zulip,rht/zulip,zulip/zulip,dhcrzf/zulip,hackerkid/zulip,rishig/zulip,brainwane/zulip,tommyip/zulip,punchagan/zulip,brockwhittaker/zulip,tommyip/zulip,rishig/zulip,zulip/zulip,shubhamdhama/zulip,dhcrzf/zulip,hackerkid/zulip,synicalsyntax/zulip,rishig/zulip,showell/zulip,eeshangarg/zulip,shubhamdhama/zulip,mahim97/zulip,hackerkid/zulip,zulip/zulip,dhcrzf/zulip,timabbott/zulip,tommyip/zulip,shubhamdhama/zulip,Galexrt/zulip,brainwane/zulip,andersk/zulip,mahim97/zulip,punchagan/zulip,andersk/zulip,shubhamdhama/zulip,dhcrzf/zulip,timabbott/zulip,rishig/zulip,Galexrt/zulip,synicalsyntax/zulip,timabbott/zulip,hackerkid/zulip,zulip/zulip,mahim97/zulip,brainwane/zulip,timabbott/zulip,eeshangarg/zulip,hackerkid/zulip,showell/zulip,synicalsyntax/zulip,Galexrt/zulip,jackrzhang/zulip,jackrzhang/zulip,hackerkid/zulip,kou/zulip,brainwane/zulip,punchagan/zulip,brockwhittaker/zulip,kou/zulip,kou/zulip,andersk/zulip,punchagan/zulip,shubhamdhama/zulip,kou/zulip,andersk/zulip,eeshangarg/zulip,mahim97/zulip,Galexrt/zulip,andersk/zulip,punchagan/zulip,jackrzhang/zulip,dhcrzf/zulip,andersk/zulip,kou/zulip,rishig/zulip,punchagan/zulip,brockwhittaker/zulip,synicalsyntax/zulip,tommyip/zulip,jackrzhang/zulip,brockwhittaker/zulip,showell/zulip,showell/zulip,hackerkid/zulip,dhcrzf/zulip,timabbott/zulip,brockwhittaker/zulip,shubhamdhama/zulip,eeshangarg/zulip,rht/zulip,eeshangarg/zulip,tommyip/zulip,synicalsyntax/zulip,mahim97/zulip,timabbott/zulip,Galexrt/zulip,rht/zulip,rht/zulip,jackrzhang/zulip,synicalsyntax/zulip,zulip/zulip,jackrzhang/zulip,shubhamdhama/zulip,timabbott/zulip,zulip/zulip,brainwane/zulip,kou/zulip,showell/zulip,rishig/zulip,tommyip/zulip,eeshangarg/zulip,Galexrt/zulip,eeshangarg/zulip,rht/zulip,mahim97/zulip,tommyip/zulip,kou/zulip,brainwane/zulip,showell/zulip,synicalsyntax/zulip,rht/zulip,zulip/zulip,punchagan/zulip,rht/zulip,jackrzhang/zulip,andersk/zulip