message: changed avatar to show how pairing more clearly
diff: @@ -15,7 +15,7 @@ To create a Parent + Child avatar combination, wrap Avatars in AvatarPair:
  ```jsx live
  <AvatarPair my={4}>
  <Avatar src="https://avatars.githubusercontent.com/primer"/>
  - <Avatar src="https://avatars.githubusercontent.com/primer"/>
  + <Avatar src="https://avatars.githubusercontent.com/emplums"/>
  </AvatarPair>
  ```
  