Update shell-introduction screenshot for Quick Settings
The screenshot on shell-introduction
for the System Menu needs to be updated for the new Quick Settings UI, as this is a fair amount different than the existing menu.
I couldn't find an official blog post about the new Quick Settings and I'm not sure the GNOME OS VM has good coverage of the basic tiles, due to networking restrictions and such. Otherwise, if a screenshot from @fmuellner's extension preview is good enough, I can submit one.