message: Updated swagger doc in stable with changes to ImageAnalysis skill (new languages and visual features)
diff: "VisualFeature": {
  "type": "string",
  "enum": [
  + "adult",
  + "brands",
  "categories",
  - "tags",
  + "color",
  "description",
  "faces",
  "imageType",
  - "color"
  + "objects",
  + "tags"
  ],
  "x-ms-enum": {
  "name": "VisualFeature",
  "type": "string",
  "enum": [
  "en",
  + "es",
  + "ja",
  + "pt",
  "zh"
  ],
  "x-ms-enum": {
  "value": "en",
  "description": "English"
  },
  + {
  + "value": "es",
  + "description": "Spanish"
  + },
  + {
  + "value": "ja",
  + "description": "Japanese"
  + },
  + {
  + "value": "pt",
  + "description": "Portuguese"
  + },
  {
  "value": "zh",
  "description": "Chinese"
  