message: Rename unknown classification to undetermined classification
diff: "classification": {
  "description": "The reason the incident was closed",
  "enum": [
  - "Unknown",
  + "Undetermined",
  "TruePositive",
  "FalsePositive"
  ],
  "name": "IncidentClassification",
  "values": [
  {
  - "description": "Incident classification was not set",
  - "value": "Unknown"
  + "description": "Incident classification was undetermined",
  + "value": "Undetermined"
  },
  {
  "description": "Incident was true positive",
  