carbon-components/src/components/toolbar/migrate-to-10.x.md

The Carbon Design System is IBM’s open-source design system for products and experiences.

### HTML

Icon from [`carbon-elements`](https://github.com/IBM/carbon-elements) package is
now used. Vanilla markup should be migrated to one seen in
`node_modules/carbon-components/html/toolbar` directory. React and other
framework variants should reflect the change automatically.