message: docs(shared-data): update v4 protocol schema - engageHeight description
  Closes
diff: "additionalProperties": false,
  "properties": {
  "engageHeight": {
  - "description": "Height in mm from bottom plane of labware (above if positive, below if negative)",
  + "description": "Height in mm(*) from bottom plane of labware (above if positive, below if negative). *NOTE: for magneticModuleV1 (aka GEN1), these are not true mm but an arbitrary unit equal to 0.5mm. So `engageHeight: 2` means 1mm above the labware plane if the command is for a GEN1 magnetic module, but would mean 2mm above the labware plane for GEN2 module",
  "type": "number"
  },
  "module": {
  