message: docs(migration): add note about button side margin
diff: @@ -294,6 +294,10 @@ errors, and reduces unused icons bloating your app.**
  - Renamed `variantColor` to `colorScheme`
  +- Removed negative side margins on `leftIcon` and `rightIcon` elements. We
  + believe the user should handle these side margins.
  + [#1024](https://github.com/chakra-ui/chakra-ui/issues/1024)
  +
  #### Features
  - Added support for custom spinners using the `spinner` prop
  