message: update CircleBadge docs
diff: @@ -16,6 +16,10 @@ CircleBadge components get `COMMON` and `LAYOUT` system props. Read our [System
  | Prop name | Type | Description |
  | :- | :- | :- |
  -| is | String | |
  +| is | String | sets the HTML tag for the component, defaults to `button` |
  +| alt | String | alt tag |
  +| size | String or Number | Use `small`, `medium`, or `large` for default sizes, or provide a custom size |
  +| src | String | URL for image used in badge if `is` is set to `img` |
  +
  export const meta = {displayName: 'CircleBadge'}
  