message: update contributor image size
diff: {
  "files": ["README.md"],
  - "imageSize": 100,
  + "imageSize": 40,
  "commit": false,
  "contributors": [
  {
  "contributions": ["doc", "example", "maintenance"]
  }
  ],
  - "contributorsPerLine": 7,
  + "contributorsPerLine": 10,
  "projectName": "chakra-ui",
  "projectOwner": "chakra-ui",
  "repoType": "github",
  