message: Add `experimental.input.forceVT` to JSON schema
  ## Summary of the Pull Request
  Looks like we forgot to add `experimental.input.forceVT` to the JSON schema when it was implemented in
diff: "description": "When set to true, we will use the software renderer (a.k.a. WARP) instead of the hardware one.",
  "type": "boolean"
  },
  + "experimental.input.forceVT": {
  + "description": "Force the terminal to use the legacy input encoding. Certain keys in some applications may stop working when enabling this setting.",
  + "type": "boolean"
  + },
  "initialCols": {
  "default": 120,
  "description": "The number of columns displayed in the window upon first load. If \"launchMode\" is set to \"maximized\" (or \"maximizedFocus\"), this property is ignored.",
  