message: feat(content-item): add themed token and small style changes
diff: @import '../../../globals/imports';
  +@mixin themed-items {
  + .#{$prefix}--content-item__heading,
  + .#{$prefix}--content-item__copy {
  + color: $text-01;
  + }
  +}
  +
  @mixin content-item {
  .#{$prefix}--content-item {
  display: flex;
  &__heading {
  margin-top: $carbon--spacing-07;
  - @include carbon--type-style('heading-02');
  + @include carbon--type-style('heading-02', true);
  }
  &__image {
  }
  &__copy {
  - @include carbon--type-style('body-long-02');
  + @include carbon--type-style('body-long-02', true);
  }
  +
  + @include themed-items;
  }
  @include carbon--breakpoint('md') {
  .#{$prefix}--content-item__image {
  width: 75%;
  }
  +
  + .#{$prefix}--content-item__heading,
  + .#{$prefix}--content-item__copy {
  + width: 95%;
  + max-width: rem(640px);
  + }
  }
  }
  