[docs] Fix a typo in the SettingsPlugin docs
[docs] Fix a typo in the SettingsPlugin docs

Salandora/OctoPrint,Jaesin/OctoPrint,beeverycreative/BEEweb,Salandora/OctoPrint,foosel/OctoPrint,beeverycreative/BEEweb,foosel/OctoPrint,JackGavin13/octoprint-test-not-finished,JackGavin13/octoprint-test-not-finished,foosel/OctoPrint,JackGavin13/octoprint-test-not-finished,Jaesin/OctoPrint,beeverycreative/BEEweb,Salandora/OctoPrint,Jaesin/OctoPrint,foosel/OctoPrint,JackGavin13/octoprint-test-not-finished,beeverycreative/BEEweb,Salandora/OctoPrint,Jaesin/OctoPrint