applets/systemmonitor: Fixed typo causing undefined constant being used
Reason for the change
While trying to figure out how the system monitor widgets work I ran colordiff -U3 /usr/share/plasma/plasmoids/org.kde.plasma.systemmonitor/contents/ui/*Representation.qml
on my system and found this typo which looks like a bug. Although there's also a tiny bit of altruism involved, I ended up here on the vain path of trying to go down in (git) history. So I hope you find this trivial fix useful, but feel free to reprimand me as you see fit.
Test plan
None.
Screenshots or screen recordings
None.
Bugs fixed
Probably.