systemsettingsrunner: Fix all matches having the same id
The id is used by KRunner to increase the relevance for often launched KCMs.
Test Plan:
Delete ~/.local/share/krunnerstaterc
build + install this commit and restart KRunner
launch a few KCMs using KRunner
The ~/.local/share/krunnerstaterc
file should contain LaunchCount
entries with the following pattern: <count> krunner_systemsettings_<id of KCM>
KCMs that get opened often, should be positioned higher in the list. (in case they have the same match type).