message: chore(docs): update image data type in readme
diff: @@ -53,7 +53,7 @@ ReactDOM.render(<App />, document.querySelector('#app'));
  | Name | Required | Data Type | Description |
  | --------- | -------- | --------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- |
  | `heading` | YES | String | Short copy describing content item. |
  -| `image` | NO | Array | See the [`Image`](https://github.com/carbon-design-system/ibm-dotcom-library/tree/master/packages/react/src/components/Image) component for full usage details. |
  +| `image` | NO | Object | See the [`Image`](https://github.com/carbon-design-system/ibm-dotcom-library/tree/master/packages/react/src/components/Image) component for full usage details. |
  | `copy` | YES | String | Item content. |
  ## Stable selectors
  