message: fix(content-section): applying new mixin name in selectors
diff: .#{$prefix}--content-section-story .#{$prefix}--content-section__children {
  height: carbon--mini-units(60);
  padding: $carbon--spacing-05;
  - @include themed-items;
  + @include content-section-themed-items;
  }
  .#{$prefix}--content-section--g10 .#{$prefix}--content-section__children {
  @include carbon--theme($carbon--theme--g10) {
  - @include themed-items;
  + @include content-section-themed-items;
  }
  }
  .#{$prefix}--content-section--g90 .#{$prefix}--content-section__children {
  @include carbon--theme($carbon--theme--g90) {
  - @include themed-items;
  + @include content-section-themed-items;
  }
  }
  .#{$prefix}--content-section--g100 .#{$prefix}--content-section__children {
  @include carbon--theme($carbon--theme--g100) {
  - @include themed-items;
  + @include content-section-themed-items;
  }
  }
  