message: fix(leadspace): fixed spacing between buttons on buttongroup
diff: .#{$prefix}--buttongroup-item {
  margin-top: $carbon--layout-01;
  - max-width: 22rem;
  + max-width: 21rem;
  min-width: 0;
  @include carbon--breakpoint(md) {
  - padding-right: $carbon--layout-03;
  + padding-right: $carbon--layout-01;
  flex: 1 1 0;
  }
  }
  