Fix typo in preference description
Fix typo in preference description

nog -> not

senttech/Cura,ynotstartups/Wanhao,Curahelper/Cura,ynotstartups/Wanhao,totalretribution/Cura,hmflash/Cura,hmflash/Cura,fieldOfView/Cura,fieldOfView/Cura,totalretribution/Cura,senttech/Cura,Curahelper/Cura