JSON fix: unit of jerk: mm/s³ ==> mm/s (CURA-1646)
JSON fix: unit of jerk: mm/s³ ==> mm/s (CURA-1646)

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